BP Totty
Main thing is they go with a good chevra and dorm/dira with good chevra. Also, make sure your son doesnt try to be “oiber chuchem” and enroll in a shiur thats beyond his present level of learning because it easily leads to burnout. Another point is he needs good chavrusos, if his chavrusas arents good he has to be ready to switch and not try to stick it out and risk wasting a zman with bad chavrusos. My first zman I had 4 chvrusah switches in the first week! A chavrusah is like a shidduch and if it doesnt match its not going to go. As a former Mir Bachur I can tell you these are the main issues.