I can recommend Lightnote [0] on music theory. It has tons of interactive courses, for which made it really fun to learn the music theory for me. Disclaimer: I

I can recommend Lightnote [0] on music theory. It has tons of interactive courses, for which made it really fun to learn the music theory for me. Disclaimer: I’m not associated with lightnote, but just a happy customer who paid for the premium package. [0] https://www.lightnote.co https://www.lightnote.co