I do have a personal recommendation. Get him into Boy Scout. They have ranges with 22s at every BSA camp that I have visited thus far. Some of them even have shotgun practice. The range area is very popular activity with the campers.
Our troop goes to the range at least once a year to shoot their 22s. I plan on taking my 9ml with me for that trip. I may let some of the other moms try out my new toy.
He was in Cub Scouts for several years (I was his Cubmaster one year) and he was in Boy Scouts for a year, before sports became more important than Scouting. I really wanted him to stick with it, but he plays three sports, so it was a big time commitment on top of sports.