Disclaimer: I'm just adding this for references, my two cents is what the book says already. Also I don't consider this version for deep study, but this is an overview of the passages. Is BSB.
--------------------------------------------------------
Acts 2:36-46
36Therefore let all Israel know with certainty that God has made this Jesus, whom you crucified, both Lord and Christ!”
37When the people heard this, they were cut to the heart and asked Peter and the other apostles, “Brothers, what shall we do?”
38Peter replied, “Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins, and you will receive the gift of the Holy Spirit. 39This promise belongs to you and your children and to all who are far off—to all whom the Lord our God will call to Himself.”
40With many other words he testified, and he urged them, “Be saved from this corrupt generation.” 41Those who embraced his message were baptized, and about three thousand were added to the believers that day.j
42They devoted themselves to the apostles’ teaching and to the fellowship, to the breaking of bread and to prayer. 43A sense of awek came over everyone, and the apostles performed many wonders and signs.
44All the believers were together and had everything in common. 45Selling their possessions and goods, they shared with anyone who was in need.
46With one accord they continued to meet daily in the temple courtsl and to break bread from house to house, sharing their meals with gladness and sincerity of heart, 47praising God and enjoying the favor of all the people. And the Lord added to their number daily those who were being saved.
---Doesn't seem to say anything about them getting sinless and perfect first to me here.
------------------------------------------------------------
Acts 16:29-34
29Calling for lights, the jailer rushed in and fell trembling before Paul and Silas. 30Then he brought them out and asked, “Sirs, what must I do to be saved?”
31They replied, “Believe in the Lord Jesus and you will be saved, you and your household.”
32Then Paul and Silas spoke the word of the Lord to him and to everyone in his house.
33At that hour of the night, the jailer took them and washed their wounds. And without delay, he and all his household were baptized.
34Then he brought them into his home and set a meal before them. So he and all his household rejoiced that they had come to believe in God.
---I'm just going to go for a long shot and say they likely were not sinless and perfect here either.
-------------------------------------------------
Acts 10:42-48
42And He commanded us to preach to the people and to testify that He is the One appointed by God to judge the living and the dead. 43All the prophets testify about Him that everyone who believes in Him receives forgiveness of sins through His name.”
44While Peter was still speaking these words, the Holy Spirit fell upon all who heard his message.
45All the circumcised believers who had accompanied Peter were astounded that the gift of the Holy Spirit had been poured out even on the Gentiles.
46For they heard them speaking in tongues and exalting God. Then Peter said,
47“Can anyone withhold the water to baptize these people? They have received the Holy Spirit just as we have!”
48So he ordered that they be baptized in the name of Jesus Christ. Then they asked him to stay for a few days.
---Here it seems they got the Holy Spirit from believing in Jesus when they heard before they even had a chance to get baptized.......
---------------------------------------
Luke 23:39-43
39One of the criminals who hung there heaped abuse on Him. “Are You not the Christ?” he said. “Save Yourself and us!”
40But the other one rebuked him, saying, “Do you not even fear God, since you are under the same judgment?
41We are punished justly, for we are receiving what our actions deserve. But this man has done nothing wrong.”
42Then he said, “Jesus, remember me when You come into Your kingdom!”
43And Jesus said to him, “Truly I tell you, today you will be with Me in Paradise.”
---Then there is this guy... Whoa. No baptism at all but I would put all my betting chips in the pot this guy is with Jesus.
-----------------------------------------------
I don't really dig into denominations, so I'm probably no help there at all.