Every person who has trusted Jesus Christ as their personal Savior should be baptized. Once a person has believed in Jesus, he or she is ready for baptism. There are no other requirements - nothing more and nothing less.
"[Paul and Silas] replied, 'Believe in the Lord Jesus and you will be saved, along with everyone in your household.' And they shared the word of the Lord with him and with all who lived in his household. Even at that hour of the night, the jailer cared for them and washed their wounds. Then he and everyone in his household were immediately baptized." -Acts 16:31-33 NLT