Extracurriculars: Help!

I’m graduating in 2020 and i really need help with my extracurriculars. I don’t really have that much extracurriculars since i’m not a sporty type of person. I signed up for the Future Doctors Club at my school, but they never met. Can I put that as one of my extracurriculars? The only things I did out of school in my freshman and sophomore years was volunteering at the library once a week. For this year (junior) and next year i help at a Habitat for Humanity once a week. However, my school requires 100 mandatory volunteer hours. Can I put volunteering as extracurriculars even though my school requires hours? I am almost surpassing my 100 hours, and I will still volunteer at the habitat.

I also did piano lessons from freshman to junior year, but stopped because my teacher stopped offering lessons. can i put that on my extracurriculars list?

Ooh! I also did a robotics camp in the summer after my freshman year. Can I put that on?