First off - welcome! Now relax, you have plenty of time. The starting point is to read the timeline on this website (move your curser to the left and viola!)
The most important advice, let your kid have fun while developing skills. Help him when he needs help and he will let you know what is needed. Help him grow as a person amd make sure that he does well in school.
I remember when my son was that age, he played fall ball with the kids from HS, HS ball in the spring and 3 teams in the summer. He did the JO's when he was 14 & 15 as well as local tournaments. However, the purpose to all of this was to compete and get better. If I had to do it over again, he would have done less instead of more.
Have fun, get to know your son and time will dictate what will happen.
Good Luck!