First, look at colleges that you are potentially interested in and see how much they care about ECs.
Google "Common Data Set " and look at “Relative importance of each of the following academic and nonacademic factors in first-time, first-year, degree-seeking
(freshman) admission decisions.”
At NJ’s State Flagship, ECs are only “considered” (vs. Very Important or Important). For big schools, admission is mostly based on GPA/SAT/ACT.
Working is an EC.
What do you want to major in? Is there related volunteering ? For example, my daughter wants to be pre-med so she volunteered at a hospital to a) help the community b) see if she liked the medical profession c) For community service hours for NHS/College apps.
Do you belong to a house of worship? You could volunteer there as part of that community.
Is there a disease (breast cancer, autism, etc) that anyone in your family has? YOu could volunteer for those charities.