I'm not sure I'm Christian yet. It might take me a while to know if I am one or not.
You need to be converted by the power of the indwelling Holy Spirit to become a Christian.
3 Jesus answered and said to him: Amen, amen, I say to thee, unless a man be born again, he cannot see the kingdom of God.
4 Nicodemus saith to him: How can a man be born when he is old? Can he enter a second time into his mother's womb and be born again?
5 Jesus answered:
Amen, amen, I say to thee, unless a man be born again of water and the Holy Ghost,
he cannot enter into the kingdom of God.
6 That which is born of the flesh is flesh: and that which is born of the Spirit is spirit.
7 Wonder not that I said to thee: You must be born again.
8 The Spirit breathes where he will and thou hear his voice: but thou know not whence he comes and whither he goes.
So is every one that is born of the Spirit.
John 3:3-8
15 And he said to them: Go ye into the whole world and preach the gospel to every creature.
16 He that believes and is baptized shall be saved: but he that believes not shall he condemned.
17 And these signs shall follow them that believe: In my name they shall cast out devils. They shall speak with new tongues.
18 They shall take up serpents: and if they shall drink any deadly thing, it shall not hurt them. They shall lay their hand upon the sick:
and they shall recover.
Mark 16:15-18
38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins,
and ye shall receive the gift of the Holy Ghost.
39 For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.
4 And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
Acts 2:38-39, 4
44 While Peter yet spake these words, the Holy Ghost fell on all them which heard the word.
45 And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles
also was poured out the gift of the Holy Ghost.
46 For they heard them speak with tongues, and magnify God. Then answered Peter,
47 Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we?
Acts 10:44-47