Well, SFs need both outside and inside skills, so you could work on this guy's inside skills while you keep training Willard Larue (or whatever other bigs you are training).
But to be an effective SF, he's going to need a lot more outside defense, which is going to train pretty slowly on him, because his height is right in the middle of the range, so he won't get any bonus there. And the other skills that are linked to OD (esp jump range) are low, so there's little elastic effect. His low passing is a drag too.
Honestly, I think this guy is gonna be a bit hard to make into a good SF. He kinda needs everything, so if you can fit him in with other trainees, cool. But I'm not sure I'd make him the centerpiece of your training plan.