He had fasted. He believed in Jesus and realized that he was wrong. It was time for action. Many people believe in Christ and are sorry for their sins, but they put off being baptized, even though they know it is a command of the Lord. When you read the book of Acts, which gives many examples of conversion, you will notice that people were baptized immediately, as soon as they believed in the Lord.
Bible baptism is an immersion in water.
Churches that sprinkle or pour a little water on people are not following the Bible. What they do is not baptism, it is not immersion. In reality they do not baptize people at all. He has not obeyed the Lord. A valid baptism must result from a personal decision to repent of sin and follow Jesus.