Private music schools basically don't need exams. I don't know if you want to play or take the exam. Personally, I can play at the age of 22. Although the exam is amateur, the higher the level, the more difficult it is to practice. The qualification of music school is secondary. It depends on the teacher and his own efforts, and of course the price. I am learning the piano. In fact, you have to learn the electronic organ, which is nothing more than music theory and performance. Music theory is all paper knowledge, which does not require in-depth study, such as composing music. Basically, you have to work hard to identify music and play. I don't know if you've had any contact before. If you want to play well, you can't do without basic skills, let alone feelings. My suggestion is to find a good teacher and practice your grades by yourself. I hope to adopt.