@boomerang,
There's acting and directing and all the techy stuff, re which I have many acquaintances. The one thing I could have gotten into, even though there were few women at the time, and somewhat regret I didn't, even now, is film editing. Ah well, as land arch was pretty interesting too.
I have some biases against actors, can't help it, after many dinners at my house where I couldn't get a word in edgewise with all the egos... for hours and hours. Those were stage actors. That may have been just that precious batch of folk, in those years. Mac11 has a rounder view than mine, I think.
What am I saying.. the making of movies is complex, and if he gets a clue about it more than just about being onscreen, then I think that's positive.