Hey Melaina
He should try a few different meetings until he finds one which he is comfortable in. The 12 step programme is spiritual, not religious and there is a difference though people get confused. My View is its good to be surrounded by people like you and get support and learn how they got out of it all and how they live.
12 step meetings don’t have the monopoly on recovery, despite what people may say, so the counselling and other work in addition to this are really good