I'm also thinking about this problem. I study music, so no matter how many instruments I learn, I can't get out of the framework of music. I really want to cultivate a hobby other than music. I just asked Du Niang to search the definition of interest. Interest is an individual's positive, tendentious and selective attitude and emotion based on specific things, activities and people, so I thought of swimming and skating. These interesting and trainable projects can be called interests. If you are interested in music, you can learn one of the simplest low-cost musical instruments-the harmonica, or play singing. This musical performance is very interesting. These are good, low-cost things that can be played for a long time. Hope to adopt.