Baptism is for cleansing, right? But cleansing what? The spirit? How is physical water going to wash the inside of a man? When Jesus spoke to the multitudes in John 6, He didn't once mention the necessity of baptism - but rather said that if anyone eat His flesh and drink His blood, they would have eternal life (John 6:53-56). Jesus equated Himself with the bread of life and said that a man had to eat of Him - not as of physical bread, but as of spiritual (6:57-58). And yet the people wanted something they could hang their hats on - something physical to point to - but He wouldn't budge. He said that it was Jesus and His word in them that saved - not anything physical.
What and if ye shall see the Son of man ascend up where he was before?
It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
John 6:62-63
Baptism no more saves and cleanses than the Jordan river heals leprosy. It is the word of Jesus that does this.
Now ye are clean through the word which I have spoken unto you.
John 15:3
Husbands, love your wives, even as Christ also loved the church, and gave himself for it;
That he might sanctify and cleanse it with the washing of water by the word,
That he might present it to himself a glorious church, not having spot, or wrinkle, or any such thing; but that it should be holy and without blemish.
Ephesians 5:25-27
The issue is not the question of whether to baptize at all, rather it is a question of what one rests upon.
You say it's three Gods I don't even wanna talk to you about water baptism until I beat you up with Scriptures with one God. Who is the Savior Jesus or God.?