Welcome! You might want to start off going to the Read Me thread closer to the top of the music forum, and reading the Double Degree Dilemma essay which is really about different ways to study music.
You can get a BM (2/3-3/4 classes in music), a BA (1/4-1/3 classes in music), a double degree BA/BM (or MM), double major (within the BA and sometime within the BM), major minor. You can major in music of course, including music therapy, and some musicians even major in something else and continue with lessons and extracurricular performance.
Music majors in general have a high admission rate to medical school. You have to cover the prerequisites. You can do that during undergrad in various ways, and you can also attend a post-baccalaureate program after you graduate, which covers those (but you have to pay for that.) There are a lot of them. Here is one example: Goucher College PBPM: Application and Admission | Goucher College
You can also consider nursing (there are accelerated programs after graduation if you do music for undergrad) and physician’s assistant programs.
Look also at community college health professional programs in nursing, PT, OT and other paths, which could be done after graduation too.
Berklee has a graduate program in music therapy and you can look into those too.