Paragraph 4 (p. 175) of Chapter 18 of “Bible Teach” states: “Water baptism is a requirement for all who want to have a relationship with Jehovah God… To qualify for baptism, however, you must take definite steps.”
The chapter goes on to spell out no fewer than 15 requirements the Watchtower says you must meet before you can be baptized.
These are not matters left between the individual and God.
Rather, they are matters which Watchtower elders examine and evaluate.
This establishes a religious culture in which converts learn to be completely dependent on what a small group of elders thinks of them.
Later, you’ll want to contrast all this with the baptisms of people in the Bible.