You have some schools on your list (eg, Brown, Cornell, Dartmouth) that do not give merit aid.
Have you run the NPC on each school on your list?
What is your budget for a full 8 years of university? What is your budget without taking on any debt at all?
Are you also applying to in-state public universities?
There are a huge number of universities (hundreds of them) which can prepare you very well to apply to medical schools and to do well in medical school. However, medical school is expensive. If you attend an in-state public university you can be well prepared for medical school, and you might be able to save some $$$$ that can be applied to medical school (or you might at least avoid or minimize debt for your bachelor’s degree).
And you will find premed classes to be very challenging at any one of at least 100 and probably more like 200 colleges and universities across the US. Both daughters had majors that overlapped with premed classes and I have heard many stories about how tough these classes are and how strong the premed students are (and I have met several, friends of both daughters). If you show up on campus in the top 1/4 of incoming students, then you will still find premed classes to be very challenging and you will find a lot of similarly strong students in these classes.
I really do not know how 120 hours of medical shadowing compares to other high school students who are applying to BS/MD programs. Our daughter who is currently studying for a DVM had a LOT more relevant experience by the time that she was applying to DVM programs, but she was quite a bit older when she was applying to them. I would consider all BS/MD programs to be high reaches.
To me it sounds like you are serious about getting your MD. With this in mind, I think that you need to keep your budget in mind unless your parents are fine with spending something like $900,000 over 8 years, and you should be applying to some in-state public universities or other universities that are certain to be affordable.
Also, think about what you might want to do if you do not end up in medical school. The large majority of students who start university thinking “premed” end up doing something else. Some versions of “something else” are also medicine-related (such as a PhD in a subfield of biology). Some versions of “something else” can be in entirely different fields.