Before you make your list too top heavy with the highly-selective schools that your stats suggest would fit you well, keep in mind that those schools are looking to train future leaders in medicine. Ask yourself if your Experiences reflect that potential. From the sparse information provided, tht potential isn't evident, but I understand you may prefer to retain anonymity if some of your experiences are too identifiable. If what you've mentioned is all there is, then your niche may be below the top 20 schools, though adding some dream schools is always a good idea, so that at least you tried. If it's really important to you to go to a highly ranked school, then another year of substantive research (ideally with a pub), some strong leadership, and some continued involvement in community service and a clinical venue might be in order.
With the volunteering time in the family practice office, I would carve out the hours you spent actively engaged in helping to care for patients and put it as clinical experince time, with the rest listed under physician shadowing (typically listed under "Other"). Since your other mentioned clinical experience is on the very-light side for a typical applicant, it will help you (a lot) to separate out the FP office time in this way.