Keeping a hobby, a hobby can be an issue. Students, like athletes can easily burnout if they don't monitor their current activity with their original motivation for taking lessons.
Adults can be especially vulnerable to this problem. Trying to catch up for lost time they often over practice, which over time leads to exhaustion and/or injury.
Learning piano is a journey that lasts a lifetime. Focus on the process, not the destination is often quoted in the success literature. I concur.
You've got to learn your instrument. Then, you practice, practice, practice. And then, when you finally get up there on the bandstand, forget all that and just wail.
I'm a professional pianist and music educator in West Toronto Ontario. I'm also a devoted student and teacher of the drums.