It is very hard to come in at CB at his age. It is very, very hard to play CB at that age when the midfield offers almost no protection. It is very very very hard to play CB at that age when the midfield offers almost no protection and there is no quality senior pro next to you talking you through the game.
I feel sorry for the lad. He would do a hell of a lot better with a Carra, Sami or even a Lucas next to him.