Acts 2:38 And Peter said unto them, “Repent and let each one of you be immersed in the name of Messiah for the forgiveness of sins. And you shall receive the gift of the Set-apart Spirit.
Acts 2:39 For the promise is to you, and to your children, and to all that are far off, as many as the Master our Elohim shall call.
Also, notice in verse 38 Peter says Repent. Repent means to change what you are doing, i.e. stop sinning. When the Pharisees came to John to be immersed, did he say, glad to see you – just believe, really? He said no! Who asked you to flee from the wrath to come – first bring forth fruit meet for repentance?
Matthew 3:7 seeing many of the Pharisees and Sadducee coming to his immersion, he said to them, “Brood of adders!” Who warned you to flee from the wrath?
Matthew 3:8 Bear, therefore fruits worthy of repentance,
The basic Doctrines of the Renewed Covenant Assembly are found in Hebrews 6:1 & 2. Yes, you must be a believer and you have to repent of dead works. What are dead works? Sin is dead works.
Hebrews 6:1 Therefore having left the word of the beginning of the Messiah, let us go on to perfection: not laying again the foundation of repentance from dead works and of belief toward Yah,
Hebrews 6:2 Of the doctrine of immersions, and of laying on of hands, and of the resurrection of the dead, and of eternal judgment. Yes, you must believe, but you also must repent of dead works. What are dead works? Sin is dead works. So, we must stop sinning.
Acts 5:32 And we are his witnesses to these matters; and so also is the Set-apart Spirit, whom Elohim has given to those who obey Him. Yes, we are saved by favor (grace).
Ephesians 2:8 For by favor you have been saved, through belief, and that not of yourselves, it is the gift of Elohim.
Ephesians 2:10 For we are His workmanship, created in Messiah unto good works, which Elohim prepared beforehand that we should walk in them. We were also created to perform good works.