There isn’t any scripture about Jesus growing up. But Jesus followed the law all his life. The bible is filled with how to train up a child. Joseph, Jesus’s earthly father, was an orthodox practicing jew. He followed the law like Jesus did. Jesus was bar mitzvah the year He went to Jerusalem with His parents for Passover. It means to become a man. He would have started working with His father as a carpenter. And He went to Jewish school to become a rabbi. He led a pretty normal home life. Which all lead to Him becoming a man. Jesus was subject to Mary and Joseph, so He would have a normal life. At the marriage feast in Cana, all Mary had to do was to speak to Jesus and He complied. Because He was a man under authority and grew up the way God wanted Him to. This is becoming a man.