You might also need to do a bit more research as to the double degree offerings at the schools you mentioned. Peabody’s academic degree would be granted by Johns Hopkins - others may know the current state of affairs, but I know historically, getting admitted to a double degree program at Peabody/Johns Hopkins is very difficult. And, if accepted, there are two campuses to deal with. CIM has a double degree program with Case Western. Again, not an easy admit. (You could look at Case Western for the possibility of a music and computer degree. The playing level expected is not as high as CIM.) Oberlin is often supportive of double degrees, depending on studio teacher. I don’t know the situation with Indiana, others might help.
My point is, there are concerns simply beyond your playing ability. There is also the attitude and methodology the college/conservatory takes to double degree seekers.