Drum is relatively simple compared with other musical instruments, because it does not involve modes, scales, chords and so on. And the required music theory is only and basically the part of notes and duration.

When getting started, it is suggested to find a drummer's belt, standardize the form of percussion, master the correct playing method and avoid detours.

After that, you can do your own research. Hehe, after all, I just like to have fun and don't want to major. There are many videos on the Internet and a lot of information on the market. If you are careful, there should be no big problem.

Hehe, I hope I can help you.