Yeah I know the feeling. It so much you can do. Not only time is a limiting factor, sometimes it is energy as well (especially if you have to work 8 hours a day). Doing something amazing 14 hours a day does not work. It is very hard to set the priorities right because you could miss out on something. Whats more important - doing sport or be creative etc.
I struggle with this kind of questions every day. My "solution" is to think about every new activity some days or weeks before I start. When I'm still want to do it, than I maybe should try it and therefore spend less time on some of my regular activities.
It is important to notice that goals and interests change over time. Thats normal and nothing to worry about.