A lot of people ask this. Are we still under the Ten Commandments ? Think of it this way. One of the commandments God said is : Do Not steal
If you want to see if we are still "under" that commandment, here is a simple test. Go to your favorite store, and steal something. And see what happens .I would not try it. I assure you nothing good will result from that. So that law is still very much in effect. And if you did , I would repent for doing it. Because its a sin.
Here is one simple scripture to consider also :
1 Timothy 1:
9 Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,
If you are not doing anything wrong, then there would be no need for you to worry about the Law. The Law keeps a bad man out of trouble ideally. And good men keep the law.
Christ fulfilled the Law. He did not destroy or do away with it.
What did He did do away with? Ritual blood ordinances that was prescribed by the law to forgive sin was abolished . So Christ did away with that on the cross. The book of Hebrews ,should clear that it was the sacrifices that was law then, was done away with but no mention of the Ten Commandments , or things of that nature being done away with.
But the Law remains. The Law is not bad. It is man that brakes that law that is bad. God's Law is good. Try to keep things in perspective . Listen to Christ teachings :
Matthew 5:18
18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
jot or tittle, that means not even the punctuation is changed about the law, not the sound even of one letter.
I follow all the Ten Commandants. Everyone that brakes those laws can end up going to a bad place.
As far as some of the feast days. I think some of them were supposed to be observed in one form or another, but I never studied those.
Christ became or Passover in one scripture. So Passover should be observed, instead of Easter.