Brazilians are not under represented in medicine in the US.
Having conversational fluency in Spanish is a plus though. You could try some of the very competitive schools but make sure your list is broad. I suggest:
UMD
Johns Hopkins
UVA
VCU
Emory
Einstein
Hofstra
Rochester
WUSTL
Vanderbilt
Miami
USF
Jefferson
Temple
Pittsburgh
Dartmouth
Tufts
Mayo
Western Michigan
Vermont
Ohio State
Cincinnati
Iowa
Creighton
Boston
Colorado
Keck
Columbia
Brown
Michigan