Bs/md at university of oklahoma

My son got accepted at the University of Oklahoma BS/MD program and he is excited to be a part of the program there. Just wanted to ask if anyone can give us some advice about the undergraduate work. It seems u have to maintain a
3.7 GPA in all the science classes which shouldn’t be super difficult, but would love to hear from any students who have gone through the program (or are currently in the undergraduate school). Any advice ? Thanks !