Well, first of all. Don't waste your time with AP Bio.
You need the college experience, first try to dual enroll in courses. The reason I say this is because, you might have trouble getting a 4 year university to accept your AP credits. Now, more cases than not, they will work out;however, there are plenty of people who have to retake a bio course in college that they already did for AP. A great benefit is the fact that you can already start working on your Medical school GPA while in high school. I finished biology 101, and 102 this year as a senior and have maintained 8 credits worth 4.0/4.0 each. You must take these classes seriously, because the effect can weigh in on your admission to medical college(but one C right now is not going to hurt you, an upward trend is what you are looking for). Let's say you went the AP route, you would possibly get a 5 and receive the same amount of credits, however, you won't receive a GPA for the course. Obviously, this is nothing that is going to hurt you for medical school;however, I would advise getting these easy 4.0/4.0 science credits in. Considering, biology at intro-level is plain memorization(any idiot can do well).
Secondly, I would advise volunteering at your local hospital. This will give you insight on the field of healthcare. It might come in handy during an interview.