You need to clarrify what your point in participating in extracuricular activities is.
1. Just for fun.
2. Mental stimulation
3. Looks good on transcript.
4. Inherently interesting.
5. I want to be a rebel.
6. I want intersting.
7. I want to be mevatel torah.
8. I need a break from learning.
9. Career practice.
10. Exposure to different things.
Depending on your motive, it is easier to suggest activities.