you set the training any way you want under the training section. Then just as long as you play your rookie at the position where you have set the training to then he will be trained every week. If he pops in any skills (aka gets better) then it will show up on his player page with a little arrow beside the skill he has gotten better as well as on the training page it will show what he popped in.
Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs