As a high school student, unless you are applying to BS/MD programs, the research experience will be more valued vs shadowing. You will need shadowing hours for BS/MD and for med school admissions.
Shadowing a doctor at this young age won’t really impress college adcoms. But for med school admissions, it is expected. Reason is that they want to make sure you really understand the life of a doctor, along with the crazy hours and hectic schedule.
Note that going to a T10 college won’t necessarily help with med school admissions. Instead you should be focusing on which college will 1) help complete pre med course requirements 2) Get as high of a GPA as possible and 3) Get as high of MCAT as possible. Going to a T10 school and then ending up with a <3.5 GPA will make things difficult.