In the spirit of YeHoshua Ha Mashiach!  - MOUNT MOREH-YAH : The mountain where YeHoVaH is Our Teacher
How to keep Passover and Unleavened Bread
 
First Point  Yahshua IS our PASSOVER LAMB (Spiritually Speaking)
 
13th Day of Abib of the Sacred New Year eve
 
One Day before Yahweh Instituted Preparation Day and Prior to Twilight
 
Prepare the Special "Koinonia" Remembrance Meal (Chagigah), as per Leviticus 23:4-7, 11, 13. Do not use honey, do not prepare or eat food made with grain other than fine Barley flour, but be sure to use kosher salt, but If this day falls on a weekly Sabbath, then prepare this meal and the weekly Sabbath meals on the 12th Day of Abib.
 
Just as barley is the first to produce fruit before. wheat Barley symbolizes Messiah The First of The First Fruits, but Wheat has always symbolized the rest of "The First Fruits" of The Spring harvest. See the Parable of the Tares or Darnel in Matthew 13:24-30.
 
14th Day of Abib of the Sacred New Year
 
During Twilight - when the Rooster Crows at the END of this day Pascal Night
After Sunset (Dusk) i.e. at the end of the 13th day of Abib nighttime, The 14th of  Abib beginning is the Passover Night (Pascal Night) Eat the Chagigah Passover Meal "Remembrance" Meal with Raised Barley Bread with your family and/or with other True Believers in  Remembrance of Messiah, also Drink a cup of wine Red Wine to symbolise Yahshua's blood Immediately after the Passover meal Do This in Remembrance of Me" and wash one another feet as Yahshua did to show the purification of True Believers, as being "Clean" in Yahweh's eyes. It is, also, a statement of being humble, and brotherly love.
 
Eat Leavened Barley Bread with a regular "Passover Meal," but immediately following The Passover Meal all leavening in the home must be sought out and burned (destroyed). Do not begin eating "Unleavened Bread" prior to the eating of "The Passover" (sacrifice for sin).
 
The Preparation Day (between 12 Noon and 3PM),
when Messiah Yahshua was Crucified.Here this was before the sunset. once the sun is set we are now High day Sabbath 
 
Deuteronomy 16:6
But at the place which the Eternal Elohim (YHWH) shall choose to place his name in , there thou shalt sacrifice the Passover at even (evening), at the going down of the sun (prior to SUNSET), at the season that thou camest forth out of Egypt.
 
15th Day of Abib of the Sacred New Year:
 
The First Day of Unleavened Bread Holy Sabbath Day
 
Begins after Twilight of the 14th. day, when Darkness has fallen Immediately after The Passover meal" remove ALL Leavening Agents from Home Such as, yeast, and baking soda. Do not give this to someone else to keep for you,This shows or implies that you are put your sins on another to keep for you. This would not show True Faith and Understanding. Removing  all leavening agents before to Yahshua's sacrifice would symbolise that you were ready remove sin from your life and follow Yahshua
 
But I would suggest that it will be wise to not purchase leavened food or any leavening agents for a couple of months prior to Passover so that there would be time to consume what already exists to avoid waste.
 
Exodus 12:15
15 Seven days shall you eat unleavened (wheat) bread; even the first day you shall put away leaven out of your houses. Keep all leavening agents from the inside of your home until after the Last Day of Unleavened Bread. If you discover any after the First Day, discard it immediately; this is symbolic of discarding hidden sins in our lives.
 
This Day is a Holy Convocation; where two or three (or more) are gathered.
If this day is, also, a weekly Sabbath, you may not prepare food this day. Food must be prepared in advance if this day is a weekly Sabbath. Remember: You are forbidden to kindle a fire on a weekly Sabbath, but you may keep one going if kindled prior to The Sabbath.
 
 
21st Day of Abib of the Sacred New Year:
 
The Last Day of Unleavened Bread
 
Begins after Twilight of the 20th. day, when Darkness has begun This Day is a Holy Convocation; where two or three (or more) are gathered. If this day is, also, a weekly Sabbath, you may not prepare food this day. Food must be prepared in advance if this day is a weekly Sabbath.
 
 
.                   The First Fruits
 
 
 
First Fruits,  Who are they and how are they symbolized in Yahweh's Holy Scripture?
 
Leviticus 23:10-17 (Spiritual Parallels are in parenthesis)
10 Speak to the children of Israel (The True Seed of Abraham or the "Inward Jew"), and tell them, When you are come into the land which I give to you (The Coming Kingdom on Earth), and shall reap the (human) harvest of it, then you shall bring the sheaf of the First-Fruits (The Chosen Few - of mankind) of your (human) harvest (of True Worshipers) to the priest (Yahshua, our High Priest)
 
11 and he shall wave the sheaf of wheat (present them as if pure wheat) before Yahweh, to be accepted for you: on the next day after the (annual) Sabbath the priest shall wave it (this occurs on the morrow of The First Day of Unleavened Bread).
 
Note: The Symbolism of the First-Fruits only begins here; the complete symbolism continues through Pentecost, which culminates with the First-Fruits having received the 'Full Measure' of Yahweh's Holy Spirit. This is the Full Measure of Yahweh's Holy Character, Mind, Power that is imparted after the First Resurrection. The First-Fruits (other than Messiah) are not only symbolized by wheat, but by all the First-Fruits of all the various harvests that occur during the Seven Weeks that lead up to and culminate with Pentecost. These various varieties of First-Fruits, also, symbolise the various Gentile peoples who have become "Inward Jews" (Spiritual Jews or 'Wheat').
 
12 In the day when you wave the sheaf (of wheat), you shall offer a he-lamb without blemish (This is symbolic of a living "SELF-sacrifice") a year old for a burnt offering to Yahweh.
 
Note: It should be noted that this burnt offering is a personal sacrifice that symbolizes death to SELF. However, it is a "Living Sacrifice" in as much as it is a personal sacrifice by the owner of the lamb; and even though the lamb dies, it is still not the lambs sacrifice.This sacrifice, also, symbolizes our willingness to follow the example of Messiah.
 
13 The meal-offering of it shall be two tenth parts of an ephah of fine (wheat) flour mingled with oil, an offering made by fire (physically baked or fried, and Spiritually refined by fire) to Yahweh for a sweet savour; and the drink-offering of it shall be of wine, the fourth part of a hin.
 
14 You shall eat neither bread, nor parched grain, nor fresh ears (barley corn), until this same day, until you have brought the offering of Yahweh: it is a statute forever throughout your generations in all your dwellings.
 
15 You shall count to you from the next day after the (7th day) Sabbath, from the day (following The First Day of Unleavened Bread) that you brought the sheaf of the wave-offering; seven (weekly) Sabbaths shall there be complete (forty-nine days):
16 even to the next day (forty-nine days plus one is fifty days) after the seventh (weekly) Sabbath shall you number fifty days; and you shall offer a new meal-offering to Yahweh.
 
17 You shall bring out of your habitations two wave-loaves (no longer sheaves, but fully prepared) of two tenth parts of an ephah: they shall be of fine (Wheat) flour, they shall be baked with yeast (symbolising those who have come out of sin and have found Favour or Grace in Yahweh's eyes), for first-fruits (the small harvest of the Chosen Few) to Yahweh.