A couple more thoughts... I don't think you mentioned it, but get him in a youth league, and have him interact with the older kids who are skilled, they usually love the younger kids enthusiasm, and it can be cheap coaching to get a pair of lanes after league to practice with them for a bit.

You don't seem likely to do this, but don't criticize his performance on the lanes, but do hold him accountable for the mental aspects. Help him be a good sport that is resilient. Bowling is a marathon, not a sprint. No kicking the ball return!

When you do see things that he is doing wrong (and you will), mention it to him one or twice, but don't take it personally when he doesn't see the logic of your suggestion. It's going to happen all the time. Even Parker's kids (who we bowl with frequently) don't listen to him sometimes.

When he is older, turn off or cover the monitors every once in a while for a practice session. Then just focus on the approach, accuracy, and hitting the pocket. I will help to teach him that each shot is more important than worrying about the score. Kids love to fall into bad habits when they get into a slump, and this is a great way to take the pressure off that will allow them to get back to form and regain confidence. Especially when they hit the growth spurts. Man they are hard as a bowler.