grab lvl 4-5 trainer if you already havent one. Id start with OD training first year, since with decent OD he would be able to start league games and receive trainings without making your team to lose. Next thing id do is passing/driving then jumpshot or just turning those training in a circle each week.
If you want to make sf, id start with inside skills first. since at younger age they train more faster than with solid age, so it means less time playing offpozition and less loses in your league. Train lowest inside skill and when it is 1 lvl higher than other ones, then train those skills in circle: is, id, rb, maybe sb if you want.