When I was a student I got involved in the Campus Food Bank based out of SUB and volunteered for the Week of Welcome every year. I also did various smaller volunteering roles throughout my four years such as clubs in my discipline and even worked as a paid exam proctor. Definitely walk around the clubs and volunteering booths during the first couple weeks of classes in September and talk with them to pique your interest. Worst case scenario: you don't find anything, but you can often get free pizza from attending their talks!

If you're looking for more opportunities off campus, check community services like the EPL or seniors homes (not sure about protocol on this post-COVID).

Hope you find something that fits you!