Starting a child advocacy club?

I want to start a child advocacy club at my school next year, but I have trouble thinking of things we could do. I know it’s going to be centered around helping children and people at my school and community in abusive, challenging, or troubling situations, but I’m not sure how I could get people interested in it. I know a lot of people who would benefit from this kind of support club being made. I’m thinking we could have a main fundraising event(s) that we do for UNICEF or other charities, and maybe speeches… Any ideas?