Have a sports psychologist befriend him without telling him who he really is. Like act as a family friend. Have him do stick handling drills off ice with his head up constantly without looking down and dont change his curve. It’s all about how you approach the game on game days. It starts when u wake up in the am. He’s gotta learn to stay focused throughout the day on game days kind of like psyching himself up. If he’s playing AAA with kids a year older then him, that means this kid is an exceptional player, he just needs to know it’s not just about showing up to the rink on game days and playing. when he wakes up for school he’s gotta realize “ok today is game day, I have to prepare myself mentally” The more he’s focused there won’t be time for him to get nervous.