I’m a senior awaiting MT decisions, and let me say for your son, get him in dance classes. Jazz, ballet and tap. If a guy can dance, it gives him an edge in audition. I do think vocal lessons are extremely important, so try to find someone that has a legit technique and possibly is familiar with all this crazy audition stuff! Acting, I say camps and just being in shows is usually enough. In my area no one is good enough to teach a stand alone acting class/lesson in my opinion. I’m saving that training for college. In a nutshell, these are my recommendations! You have time, but the competition grows every year, so best of luck!