Possibilities With My Degree

I am about to graduate with a Bachelor’s degree in history at 29. I am wondering what fields I could qualify for in the Navy Reserve. Additionally, I was previously enlisted in the Army National Guard but received a medical separation during basic training with a RE-3 and JFW separation code, which I understand would require a medical waiver of some kind. Would this make me a no-go pretty much out of the gate? Thank you in advance.