What is your mission fit? In reference to Tulane, your sibling graduated from undergrad or a grad school?
Are you in a gap year (you say you will be in your second growth year by matriculation)? If so, I'm missing what you are doing in your time since graduation. You just started training as an EMT, but those hours (probably up to 1000) won't be on your app unless you reapply next cycle. So what have you been doing?
I'm not sure if the hesitation is about your clinical experience. You don't seem to have much on primary care, and we lack your actual responsibilities in your clinical volunteering.