I've been playing for many decades, poorly, 90% self-taught. Open Studio is my online campus, majoring in piano jazz, that let me start in a 'community college' atmosphere for beginnner-intermediates like me, but allows folks to move up to be part of a community of pros and semi-pros taking courses and live group sessions with top tier teachers at a top tier school. Whether you get to level 4 obviously depends on your effort and talent. After 9 months, I'm very satisfied and getting more satisfaction and joy playing my old repetoire on days after a good practice session based on lessons from level 2 or 3 courses. I really had fun and was inspired listening to Bob DeBoo's hour heads-up survey on 1/8/2025 of the many OS lessons and lectures on Thelonious Monk, but I'll stay focused on Adam's Block Chord course.