The simple answer is yes, you need to follow the Moses law.
Hebrews 10:28
“He that despised Moses\’ law died without mercy under two or three witnesses:”
Matthew 5:17 – 5:20
17 Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil. (what law was fulfil)
What he fulfill?
Acts 3:18
“But those things, which God before had shewed by the mouth of all his prophets, that Christ should suffer, he hath so fulfilled.”
Matthew 1:22 – 1:25
22 Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying,
23 Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us.
24 Then Joseph being raised from sleep did as the angel of the Lord had bidden him, and took unto him his wife:
25 And knew her not till she had brought forth her firstborn son: and he called his name JESUS.
Matthew 2:17 – 2:20
17 Then was fulfilled that which was spoken by Jeremy the prophet, saying,
18 In Rama was there a voice heard, lamentation, and weeping, and great mourning, Rachel weeping [for] her children, and would not be comforted, because they are not.
19 But when Herod was dead, behold, an angel of the Lord appeareth in a dream to Joseph in Egypt,
20 Saying, Arise, and take the young child and his mother, and go into the land of Israel: for they are dead which sought the young child\’s life.
Hebrews 10:1 – 10:10
1 For the law having a shadow of good things to come, [and] not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.
2 For then would they not have ceased to be offered? because that the worshippers once purged should have had no more conscience of sins.
3 But in those [sacrifices there is] a remembrance again [made] of sins every year.
4 For [it is] not possible that the blood of bulls and of goats should take away sins.
5 Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared me:
6 In burnt offerings and [sacrifices] for sin thou hast had no pleasure.
7 Then said I, Lo, I come (in the volume of the book it is written of me,) to do thy will, O God.
8 Above when he said, Sacrifice and offering and burnt offerings and [offering] for sin thou wouldest not, neither hadst pleasure [therein]; which are offered by the law;
9 Then said he, Lo, I come to do thy will, O God. He taketh away the first, that he may establish the second.
10 By the which will we are sanctified through the offering of the body of Jesus Christ once [for all].
More of what he came to fulfil: Matthew 2:23, Matthew 3:15, Matthew 8:17, Matthew 21:4, Matthew 27:9
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. (until the Heaven and the earth pass?)
Christ is telling you that nothing will be removed till heaven and earth pass.
Matthew 24:35 “Heaven and earth shall pass away, but my words shall not pass away.”
Revelation 21:1 “And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.”
19 Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach [them], the same shall be called great in the kingdom of heaven.
20 For I say unto you, That except your righteousness shall exceed [the righteousness] of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.