The fact that you asked the question…”Do I have that part right?” shows that you are willing to at least consider other possibilities and I commend you for that. There is nothing that I can say in one reply that will change your mind but I encourage you to continue to test the scriptures and go where God is leading you. With that being said I will share this.

Leviticus 23:2 – “Speak to the children of Israel, and say to them: ‘The feasts of the Lord, which you shall proclaim to be holy convocations, these are My feasts.” Here he is telling Moses and all of us that what comes next is not for just the Jews but for all the children of Israel because at that time these feasts were given to all 12 tribes. Who’s feasts did they say there were…MY feasts. Ok, so who are the children of Israel? They are all the people that have given their life to God in a sense. We as Gentiles have been grafted into Israel through the blood of Jesus and because of this we are now children of Israel and no longer Gentiles. See Romans 11 and Ephesians 2.

All the feasts point to Jesus, he fulfilled the Spring feasts with His death, resurrection and the Holy Spirit found in Acts 2 and when He returns again he will fulfill the fall feasts as well. Why would we not want to celebrate the feasts that are found in the Bible and point directly to Him? You said that Jesus tool the place of the lamb sacrifice and you are correct He did do that. Hebrews 10:4 says “It is impossible for the blood of bulls and goats to take away sins.” Only one of the 7 feasts were directly related to atonement and that was called the Day of Atonement/Yom Kippur. It is a day to remember His ultimate sacrifice because it was His blood that redeemed our sins.

Now can we keep the Feasts exactly as the way the Bible describes them? Answer…NO! Some things we can do, others we cannot. There is no temple or Levitical priest hood for example. Does that mean because those are not there that we should not do the best we can? Of course not…when Israel was taken into captivity multiple times that didn’t mean that those commandments went away, they just could not be done the way Moses wrote them down because they were in exile.

Another example to show that the feasts are still to be kept is the fact that the disciples still kept them after Jesus’ ascension. If they were to be done away with then why did they keep observing them?

Passover – For Passover Jesus says to do “this” in remembrance of me. The “this” is Passover.
1 Corinthians 11:23-29 “For I received from the Lord what I also passed on to you: The Lord Jesus, on the night he was betrayed, took bread, 24 and when he had given thanks, he broke it and said, “This is my body, which is for you; do this in remembrance of me.” 25 In the same way, after supper he took the cup, saying, “This cup is the new covenant in my blood; do this, whenever you drink it, in remembrance of me.” 26 For whenever you eat this bread and drink this cup, you proclaim the Lord’s death until he comes. 27 So then, whoever eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of sinning against the body and blood of the Lord. 28 Everyone ought to examine themselves before they eat of the bread and drink from the cup. 29 For those who eat and drink without discerning the body of Christ eat and drink judgment on themselves.

Feast of Unleavened Bread
Acts 20:6 “But we sailed from Philippi after the Festival of Unleavened Bread, and five days later joined the others at Troas, where we stayed seven days.”
1 Corinthians 5:6-8 “Your boasting is not good. Don’t you know that a little yeast leavens the whole batch of dough? 7 Get rid of the old yeast, so that you may be a new unleavened batch—as you really are. For Christ, our Passover lamb, has been sacrificed. 8 Therefore let us keep the Festival, not with the old bread leavened with malice and wickedness, but with the unleavened bread of sincerity and truth.”

Feast of Pentecost
Acts 20:16 “Paul had decided to sail past Ephesus to avoid spending time in the province of Asia, for he was in a hurry to reach Jerusalem, if possible, by the day of Pentecost.”
1 Corinthians 16:8 “But I will stay on at Ephesus until Pentecost,”

Feast of Trumpets (Although the Feast of Trumpets is not mentioned by name in the New Testament, the sounding of trumpets announcing Jesus Christ’s return is mentioned)
1 Thessalonians 4:16-17 “For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. 17 After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever.”

Day of Atonement
Acts 27:9 “Much time had been lost, and sailing had already become dangerous because by now it was after the Day of Atonement. So Paul warned them,”

Feast of Tabernacles
Acts 18:21 (NKJV) “but took leave of them, saying, “I must by all means keep this coming feast in Jerusalem; but I will return again to you, God willing.” And he sailed from Ephesus.” (NOTE: The NIV removed the part “I must by all means keep this coming feast in Jerusalem”

Also this feast is mentioned in Zechariah as one that all nations will keep during the millennial reign and if they don’t they won’t get rain on their land.
Zechariah 14:16-19 “Then the survivors from all the nations that have attacked Jerusalem will go up year after year to worship the King, the Lord Almighty, and to celebrate the Festival of Tabernacles. 17 If any of the peoples of the earth do not go up to Jerusalem to worship the King, the Lord Almighty, they will have no rain. 18 If the Egyptian people do not go up and take part, they will have no rain. The Lord will bring on them the plague he inflicts on the nations that do not go up to celebrate the Festival of Tabernacles. 19 This will be the punishment of Egypt and the punishment of all the nations that do not go up to celebrate the Festival of Tabernacles.”

As I am putting this together I can see this reply is very long but even so I thought it would be best to type out all of the verses. I will leave you with a link to a video I think would also be helpful and it is one of the resources a couple of us have mentioned. The video is from the New2Torah YouTube channel.

Again please ask any question you might have! Thanks for reading!