Maybe. But there is no Biblical evidence whatever to support the myth that he spent his life (after age 12) pounding nails.
Not true. Mark 6:3 says, "Where did this man get these things?" they asked. "What's this wisdom that has been given him, that he even does miracles! Isn't this the carpenter? Isn't this Mary's son and the brother of James, Joseph,[1] Judas and Simon? Aren't his sisters here with us?" And they took offense at him.
At any rate, we do know he didn't really make an appearance as a spiritual leader until the wedding at Cana -- he had to have done something before then, and given that Joseph was a carpenter, it's reasonable to assume Jesus was, too.