Hey,
During undergrad, I had no idea what I wanted to do. My first 2 years of school were nothing but B's, C's, and D's. I finished the MAMS program last year and matriculated into BUSM this year. It's a great program. If you do your part, the program and advisors will do theirs.
If you got any questions, message me...will do my best to answer em...just like past successful GMSers/more knowledge people have done for me when I first started (ie. cameras, guju)
Generally though, I'd recommend taking histo. It's a really good class and will help you out in physio as well. Also, just be confident. You're gonna be a doctor, taking tougher courseloads than you'll see in the MAMS program, so lock down and you'll do fine. Secondly, don't study for MCAT during the program. I didn't take it again, but most of the people I knew had plenty of time to study after May for an June/early July date. I know if I did take it again, I'd barely have to touch BS because of the program.
Gluck. Hope y'all come if accepted.