I have very young team now trying to grow up some of the players , any suggestion how should I grow up my team, how to train defenders, mids, attackers?
The best thing you can do is to read the forum widely. There's plenty of general advice on training and also debate, discussion and disagreements. Don't just take one answer.
... oh and read the Help a few times. Especially these:
Im about how to train them its already clear that mids needs passing, attackers needs another thing I'm about that some people has same facilities but their players are much more trained then in another teams.