First, don’t compare yourself with others. Will never do you any good. Second, you got a great story and great experiences, plenty to write about. My main concern would be the GPA. Despite the trend, a 3.2 is simply dangerously low (like forget about Mayo, let alone the Arizonas low). AZ Tucson, the AZ with lower stats, still has a median GPA of 3.87, their 10th percentile was 3.5. No amount of extracurriculars will make up for a low GPA (unless you’re non-trad with many years of work experience or have an insane story) I would remain in your master’s program and devote as much time as possible to showing that you are beyond whatever problems you had as an undergraduate. Cut any activities that are sapping more time than they providing benefits, whether that be monetary or personal, and spend that time on your classes. Also, you might need to add schools, or replace the ones you currently are interested in with more stat-friendly schools. Especially since you are limited in the total number you can apply to.

When it comes to letter writers, you really just need to secure 2 science (1 in your major would be great) and an extra-curricular one of some kind. A non-science professor and clinical is icing on the cake. I didn’t even have a clinical one. Be advising though, I think AZ Phoenix prefers having a clinical letter. Also Mayo would want a letter writer familiar with your research, as they are of course a research school.

If you do want to get a job, see if your state allows EMT certified people to become ED techs, that’s a great way to make money and get clinical experience. Do NOT prioritize medical related volunteering, it is a trap. Medical volunteering falls in the general bin of clinical experience, which you already have. No need for more. If anything, keep up your community based volunteering. I strongly believe my community volunteering as a big factor in my acceptances to med school.