I thought that in the US you do a fairly broad undergraduate curriculum in a first degree before you get to apply to medicine. Pretty sure that people do a bunch of different things for their undergraduate degree. Some 'play it safe' by doing very strictly only courses that seem relevant / that seem easy in order to maintain a GPA. Others follow up on other interests like music. Or... Animal biology... Marine biology... Perhaps veterinary science.

You can take some time to explore different things and see what you enjoy.