A few hobbies are fun even before you’re good. Baking can be a lot of fun… start with super detailed recipes and pay attention to the details. Eventually you learn to improvise and pick up little bits and pieces of how the ingredients work together.
Running/exercise is one with so many levels you can only truly compete with yourself to improve (and you’ll feel good).
Music is one that is sooo difficult. You suck for a long time, but can make incremental improvements.