well if you go to a cool gym you can hang out there and since you used to box - im sure you could work him on the pads n stuff - at my gym alot of dads like to train their sons mostly the mexican boxers because it just tends to run in their blood in this area - u could also addon to the coaches training and show him mistakes that you made and show him how to defend against them etc... - just make sure you don't call the coach wrong or totally not let him do his job - he probably knows what hes talken about - my first 2 weeks i was in stance, stepping forwards, stepping backwards, tepping forwards, stepping backwards in a straight line for 2 rounds, then another 2 with the job going forward and backward and then the bag. Then after that we talked about sparring and if I feel ready. Most coaches seem to be that way but some guys are assholes and wanna throw them in there on their first day so just make sure you pay attention to things like that