I really like this player, and would train him as well. Here is what I would do. I would start by improving his inside defense. Defense is one of the most important skills for players to have IMO. I would then train 1 on 1 for forwards. This will train driving and handling very fast, which I like a lot on my inside players, driving especially. It will also improve Jump Shot and Inside Shot. Given that those are some of his best skills, improving them as secondaries will help you create a well rounded player. I think if you train lots of 1 on 1 you can get a bunch of pops this season, as 1 on 1 trains lots of secondaries. Finally, I would move up to an advanced trainer, most div 4 teams can afford one and you will get a good return for the extra money.