Some things you can try: Taking a break and volunteering locally or abroad. Traveling to explore nature and culture. Mentoring first-time founders. Improving open source projects on your domain etc.
If this submarine post goes any deeper ill need a dive suit
If you exited properly: whatever you want.
If you exited poorly: go back out and try again.
Join our startup
Despite you sharing your experience, you didn't really share much information about yourself or what you're passionate about except that maybe you might like music. Maybe it's time to dedicate some time to that part of yourself?