What extracurricular activities should I do?

I am in high school, and I don’t do that much extracurricular activities. I want to go into medical, what are some good ECs? I can’t do sports, too late to start one now, and the only one i’m decent at and enjoy is volleyball, but not good enough to join the school team. So far:
-I volunteer for some things for the city, like a yearly festival we have
-I’m in CSF(google it), which is basically a service hours club where we need to complete 10 hours each semester

What I want to start doing:
-tutoring
-volunteering at local library
-volunteer at local hospital
-Part time job(where?)
-join clubs like HOSA and UNICEF
What else should I do? Is this enough? How much does EC matter for campuses like UCB, UCD, or UCLA?
My GPA is 3.83 right now, only because i’m a freshman and there are no AP classes for freshmen.

You could always start a Science National Honor Society or a National Honor Society chapter at your school! Student government?

what is national honor society? i’ve heard of it but don’t know what it is. I’m way too shy to do student government :confused:

It’s kind of like Beta Club!