You already caring about this and reaching out to this community makes me know he is in great hands. I was surrounded by so many great people that made my childhood and teenage years better than most with the severe stutter I had. Just try to empower him to do whatever he wants to do in life. Stuttering can’t hold him back. I didnt find that out until years later. Get him in sports, clubs, etc to find friends early and just get him around kids his age. You’re gonna do great, and so is he