And as they went on their way, they came unto a certain water: and the eunuch said, See, here is water; what doth hinder me to be baptized?
And Philip said, If thou believest with all thine heart, thou mayest.
And he answered and said, I believe that Jesus Christ is the Son of God.
And he commanded the chariot to stand still: and they went down both into the water, both Philip and the eunuch; and he baptized him.
Acts 8:36-38
Worldly churchianity makes it's own rules and regulations about baptism.
In this very beautiful passage of the bible we see a believer baptizing a new believer......no robes, no ceremony, no ordained ministers