He definitely need more OD, and guard skills in general. I would recommend some 1v1 Forwards to bring up his HA/DR to about 11-12 each (and hope for an IS pop or two). From there, you should work on his OD, Passing, and JR.
He definitely has plenty of ID and adequate REB, so for the moment you can probably consider his inside skills done (I'd like to see more shot blocking, but at his age, other skills are probably more important).
The exact skills to shoot for are going to depend on what kind of offence you want to run. If you are going to run an inside based offence, he needs more IS, Passing, and Driving. If you want to play outside, he needs more JS, JR, and Passing. If you want him to just be a lock-down defender, then just focus on OD and SB.
I would recommend getting him to 12 DR/HA, 15 OD, 10 JR, and 12 Passing, in that order. I'm not sure how long that will take you, but you could train more in whatever area you want him to focus on.