Get him shooting as soon and as often as possible. If he can't make the shot when presented there isn't much point in sitting in a tree waiting and I'd let him know that.
IOM bowhunting is a passion. You have it or you don't! If you have it shooting 4-5 times weekly is fun and rewarding. If you don't it becomes a chore and form, accuracy and determination will wither and suffer. I'd get him shooting and see which he is. If he has the passion and is willing to put the time, effort and dedication it takes in, then you've got a great seed.
As far as hunting, it may be easier to pick up an inexpensive hang on stand and scout him a spot rather then take him to your honey hole. I don't know your land situation so that may not be possible.

Most importantly I think he should become proficent with his weapon, and should be taught good ethics. If he's never hunted before you may want to show him a couple of hunting videos where the animals dies. This could change his feeling about hunting, it's not for everyone and I've seen people with lots of regret because they weren't prepared mentally for the harvest.

Good luck and thanks for you efforts to increase our numbers