Very much a diamond in the rough.
There is a long process ahead of chipping away at him to reveal what sort of player he can be before we can begin to cut, polish and see him shine for us.
It's only gametime that can chip away at him really in my opinion. Training will help with the polishing but, painful as it may be at times, gametime is the key in my opinion. Let him make mistakes, let him figure out the league and the standard he needs to be at first.