As others have said, there is no required major.
So my two cents is this–view it as a process.
First, pick an affordable college with a relatively flexible curriculum and where either you wait to choose a major, or it is easy to change majors, at least within their Arts and Science subdivision (which might be called a variety of things).
Second, really make use of whatever pre-health advising they have available.
OK, then work out a first-year schedule where you start to take the medical school pre-reqs in the recommended sequence. If things go well and you do not decide to change course (and many do decide to change course even if things go well), this will then extend into at least a second year of continuing those sequences.
Around that, starting in your first year and then on into your second, you can also fill in whatever classes you like that fulfill any general education requirements that are not already going to be satisfied by the med prereqs. You’ll probably be more than fine for any STEM requirements, but you may need to take some sort of writing course, languages, social sciences, and so on, what are sometimes known as HASS (Humanities, Arts, and Social Sciences) classes.
In the vast majority of cases, a first- and second-year schedule like that will also effectively be an appropriate curriculum plan for a Bio or Chem major, possibly Physics. And you can see why a lot of premeds end up in those majors–you do well in the prereq classes over the first couple years, and then you just need to do well in the advanced classes too, and there you go.
However, maybe while you are doing your other gen ed classes, you discover something in HASS you really like and are good at doing. And to be blunt, you may think of some of those HASS classes as relatively easy as compared to your STEM classes. So instead of loading up later on the advanced Bio or Chem or whatever classes you would need to do for those majors, you do a HASS major instead.
What everyone who is knowledgable about the med school application process will tell you is that is not at all a bad idea. If you get good grades, and if anything have a more interesting major than most, that will definitely not hurt you in the application process, assuming you have done all the prereqs and any required experiences as well.
Or do a Bio or Chem or whatever STEM major, if you prefer that. It is all good as long as you can get good grades doing it.
So rather than try to script this all out in advance, you can let the process unfold and just go with what ends up working best for you, based on your class experiences over your first couple years. Again, along the way you may also get so interested in another path you just drop off the premed track entirely, as most kids do. But even if not, being flexible like this will maximize your ability to both get good grades and also actually enjoy your college experience.