Joining with advanced rank depends on college credit hours. If you got any college credit for the courses then you might get in as an E2 or E3.
Those courses will help you if you go in as a Corpsman. You will need to do that in Hospital Corps A School. If you are American Red Cross certified you will have to re-take it because the Navy uses American Heart Association for CPR.
You might get rank faster if you have a friend join with you. It's funny how that one works.
Anyway good luck to you and if you are into the medical field become a Corpsman. That is what I did and I loved it.