With a 3.6 and an MCAT >50th% those are solid stats for many DO programs. If you do better on the MCAT (508+, probably 510 is better) then I think you stand a solid solid chance at MD, which you should be aiming for. I echo the sentiment of dohopeful13 with regards to ECs- showing an active, sustained interest in helping those less fortunate than yourself is extremely valuable for med school apps. Bonus points if it is medically related, though I think the best thing is to have some of both- volunteering in a non-med environment, and volunteering in a med environment. Ideally, you also have some medical/research related work (looks like you have that though). Good luck.
Just want to express that as a current DO student I highly highly highly recommend a first cycle just applying MD, and adding in DO in the second cycle if you don't get in. It is painful to put your life on hold and have another year of uncertainty (and a lost 250k paycheck for that year) but if you happen to not want primary care as a career, you are really giving yourself a better chance by going MD. This phenomenon will probably (not certain) get worse by the time you are accepted, too. My class, for example, has 700-800 new additional DO students that will be competing against each other for residencies. You become a competent physician either way, but the spectrum of types of physician that you can become via MD are much more easily attainable vs DO.