I can relate with this so much. My friends joke that my hobby are collecting hobbies for that reason. I get excited about learning something new, practice enough to get passable good at it, realize how much more there is to learn to hit fully proficient, try to work towards it, and end up burning out.

I thinking coding has stuck for me because you don't really just learn programming when you program. You are typically making a tool for another skill or profession which means you end up learning alot about that different skill while building out a project. That I, for me, helps stop the burn out, because each new project comings with learning outside of coding directly.

I like to think about programmers as the modern jack of all trades, but of course I'm biased.