Could that training be at age 22 or so?
The JS training could take place when he's 22, but that means until then, he'll be playing with atrocious JS, which is not good. And when he's 22, the training will slow down, so ideally if you're willing to keep and train him, you might want to start training JS asap until it is around average/respectable, then train other skills, and train JS later on.