USCMRPG

So I want to be a Corpsman, is there something specific I have to do to do that? Or do I have to have a certain level of skill in different areas?

Your character would take advanced training once the mission is over to become a Medic. At the end of the mission, ping Nick that you want to start medical training.

As far as the platoon goes, Quinn is the chief medic, although he's temporarily wearing the Senior NCO hat.

Ah, I will do that, thanks!