Here are some of the best medica universities:
Harvard University, University of Oxford , University of Cambridge, Johns Hopkins University , Stanford University ,Yale University , Imperial College London , University of California, Los Angeles (UCLA) ,
I have searched and found this site that has addition medical schools to add to the above listed by Nicoleta; https://www.beckershospitalreview.com/rankings-and-ratings/us-news-ranks-best-medical-schools-2019.html. You still have plenty of time to research on the internet, request for information from the schools you are interested in, and look on YouTube to see if there are videos for the Universities you are interested in. Make sure to keep your grades up and get involved in as many activities and clubs that you have interest in. Do not spread yourself too thin, one or two activities you truly have interest in will do. Best of luck and I hope this information is helpful.
I think this question has already been answered. See this post: