Extracurricular Advice & Help

Hi guys! I’m currently a sophomore in high school and I really want to get involved in public policy/education reform related stuff outside of school. The problem is that I’m not sure where I should get involved since most opportunities I know of are STEM related. Does anyone have any recommendations for things I could potentially get involved in, in these areas? I really just want to be able to make an impact, any help is appreciated!!