Can a person baptize themselves?
Naaman did because God commanded him to do so in order to be miraculously cured of his leprosy (2 Kings 5:14). However, he was not commanded in the New Covenant to “be baptized” (Acts 2:38; 22:16) with the promise that his sins would be forgiven and he would be saved as a result. In the New Testament, the baptism commanded for salvation and forgiveness of sins is spoken of in a passive sense in the Greek. In other words, the command is that it is something that someone else does to you, not something you do to yourself. All of the examples of baptism in the New Testament show people being baptized by someone else, not baptizing themselves (cf. Acts 2:41; 8:38; 9:18; 16:15, 33).