if you're averse to researching how federal financial aid works, which is a vibe I'm getting and that's totally fine, then here's a failsafe plan: just keep filling out and submitting the FAFSA every year from now until someone gives you an MD diploma. For pre-reqs, do them at the least expensive institution you can (that is still a 4-year, if possible, otherwise just go the CC route). Likewise for medical school. The end.
Here's more detail, as I suspect you may not be inclined to trust me without some explanation:
In both cases, you'll be getting Unsubsidized Stafford Loans to pay for your courses. For post-bacc coursework, you can only borrow ~$5500 or so a semester, and only for a year or two or something and the rest you have to pay out of pocket. For medical school, the max is something like ~$38k, and the rest you can take out in higher interest Grad PLUS loans.
But for all of that loan money, all you gotta do is fill out a FAFSA and specify what kind of coursework it's for and which schools you are applying to / attending and those loans will be waiting for you.