You obviously know nothing, and yet you post anyway.
I bet you don't even know what Diablo is. You can have multiple characters. You don't "train accounts". The maximum level for each character in the beta is 13. I've reached the maximum level on each of my characters. You can't really "train" my characters either. I'm letting you have your OWN character, and train your OWN character.
This is a safe alternative to paying 100-200 dollars on a beta account, that could easily be recovered back.
Get some fucking knowledge before you go and waste people's time.