(381.1) the thread the guys talked about...
also i checked your team half of it seems to old to train (my personal opinion)
if you got enough money try to get young players that will improve your training, also small players might train faster for jumpshot (my experience)
if you not have enough money, try to focus on positions trainings c/pf, guards or else thats easier in the beginning, you probably gonna like the quicker improvement.
also rotating the training is good, coz i think the game really likes multiskilled players.
and some other way of training not so profitable but maybe satisfying as well is when you got a very good player and try to bring him into the national team, then you can train a single postion to get the best and fastest results.