If you want to make him into an SF then you need his OD to be at least 14-15 given that he's got the potential. That should take you at least 18-20 weeks or 2 seasons. You could switch to training some passing and jr from time to time, but without high OD he'll be a liability on the defensive end. And defence far outweighs offence in BB. Once his defence is shored up you can train some of the other guard skills up to what you want.
You could also switch him over to play defence as a PF, but its unlikely your PF will have any better OD. If you have such a player or can find one on the TL, then you could get away with not training any OD. In the long term such a switch will be difficult to maintain though and could hurt your team's balance.
Hope that helps!