Now now. Youtube is a pretty good source for some types of information :c) Its just that it can be much harder to learn via such a medium as often enough the recorded teaching flows in a different direction from that of the student. I have not had a lot of success with it - but some things can be learnt.

Game design has many interesting areas and storyboards and character development are certainly among them. Much as @creativesoul had mentioned, establishing a team is a near-must.

There do exist games that have been mostly one-wo/man shows but very few have a significant following (I think Undertale is the poster child for such). But they are exceptions.

Thanks, @merej99 for weighing in on this and I do hope that you'll have a good time exploring - and that your son sees success also. :c)