There is no age limit on receiving instructions in knowledge and skill. If you feel you are ready and have the time to receive the discipline that comes with training in the medical field then go for it. I wish you the best on your journey.
Best of luck!
First you must graduate high school. Next obtain a bachelor's degree from a university. The college degree can be in any major, but students must complete a set of prerequisites. These vary slightly between medical schools. Also students take the MCAT before applying.
It is also becoming increasingly common for students to take a gap year after college.