dd does music (loads of it)- no exams, no competitions, no gradings
she does scouts - ditto, no tests/badges, in fact I am mystified as to what they actually do but seems to be a blast
sport - one is totally non-competitive, just practice together, relaxed, friendly, no competitions, no matches
(other sport in summer - plays against other teams but all very fun and low key and not stressful and competitive, at least not yet).
also art - nowadays she does occasional workshops rather than a weekly thing due to the music taking over her life, my life , everything, but these are always relaxed and non competitive too
don't worry, not everything is about being better than someone else, you do though have to monitor coaches/trainers and parents to get the feel of a place. Some dc thrive on competition mind and there is fun for them in that aspect of it. Depends how it is handled