Well, your state schools have given you interviews, so you have a solid chance of getting in!
That's a lot of hours. Were you able to get out of your comfort zone and help people less fortunate than yourself? Is this through your undergraduate or a school? I feel like the general consensus on SDN (at least what I have seen) is that you have to get off campus. If you end up not getting in, perhaps volunteering at a food bank/food closet, homeless shelter, or somewhere you can help veterans or refugees (or another group that you want to serve) would be beneficial to add.
Good luck! Hopefully others, including some adcoms, reply on here with more advice!