NEED HELP finding Youth Volunteer work in San Antonio, TX, Preferably in the 78224 zipcode!?

I'm 16 and a Junior in high school. I am in need of community service hours and would love to volunteer as a tutor or something related to education since I want to major in Education. I cannot seem to find any programs for Teens or Youth to volunteer though! Please help! And I can't drive so I would like to work somewhere on the south side (78224) since I live on that side of town and it would be easier for my parents to drop me off. Thank you(: