The Gospels tell us almost nothing of Jesus life from when his mother and step-father lost track of him, when he was talking with the elders in the temple.  We do know he was a "craftsman" or tekton in Greek.  Carpenter is too narrow a definition.  We can surmise he had known the future Apostles for many years, as they all lived in a small town.  Matthew 4:17 tells us Jesus taught before he called the Apostles.  The Sermon on the Mount has meaning often misunderstood, or at least not well understood.  In it Jesus tells his listeners what kind of people will be in the Kingdom of God.