If you are here in the USA, what you want to do at this point is check into colleges and find out which ones have pre-med programs. Then try to find the med school acceptance rate of the different colleges. Off hand the top school I can think of is: Centenary College of Louisiana with nearly a 90% acceptance rate.
the qualifications to enroll in the pre-med program are very strict and only about 10% of the applicants are accepted. So using that as a guide, what you want to do is check out the qualifications for the pre-med program and spend your next four years concentrating on subjects that will increase your performance in those areas. But, also concentrate nearly 1/3 of your studies on the humanities and arts. Most med schools want an applicant that is well rounded and has at least functional apptitude in other areas.
Now that you got into college. For the first year your mentor, adviser, etc will help you develop your curriculum. For the next three years you will be writing your own for submission provided it meets the approval of your advisor. In your senior year you will be faced with taking the MCAT. I would strongly urge you to take both the MCAT and the GRE. This will allow you the opportunity to pursue either a Ph.D or an MD depending on how your interest form.
Now as far as what grade I am in, I retired as a psychologist 17 years ago. Then became a farmer. I figure it took me 50 years to become a farmer and all this time I thought I wanted to be a Psychologist.