On the enlisted side of things, your college courses have no bearing on your training. They could care less really. What I think you should think about is how you are interpreting the LPN=68W thing. I am not positive and tell me if I am wrong, but you probably heard that a 68W in a hospital setting is kinda like what an LPN would do. It is really apples and oranges, and that comparison is just made because there arent alot to equate it to. You will definitely not learn the exact same things as you did in your LPN training. You will learn alot of different things while in AIT, that you never had the chance to in your LPN training. You will go in depth into emergency care. If I am not mistaken the entire first 6 weeks of your AIT will be EMT stuff.
After completion of Basic Combat Training, soldiers training for 68W10 ship to Fort Sam Houston, Texas for Advanced Individual Training (AIT). The AIT or job training may last for 16 to 68 weeks, depending what additional skill training is completed. Training includes a combination of lecture, hands-on, and practical field exercises with many skills—including starting intravenous lines—practiced on each other. The first part of the course focuses on CPR and EMT-Basic training and concludes with certification tests for both skills. Further training is on Army specific tasks. -Wikipedia
Also keep in mind AIT will have other classes not exactly pertaining to the health care profession.
There are also multiple types of medics.
F3 is an Army Flight Medic
M6 is the Army's Licensed Practical Nurse
P1 is an orthopedics
Y8 is an immunization-allergy
specialist (clinical, lab)
N3 is the Army's Occupational Therapy
N9 is a physical therapy
Y2 is the code used to identify those who have not finished the upgrade classes
W1 is a special operations combat medic
W2 is a Civil Affairs
P3 is an optometry
Y6 is a cardiovascular
specialist (Cardiac Catheterization Technologist and Echocardiographer)
P2 is an Ear Nose and Throat
So all in all I would say you are making a good decision to go in as a 68W. And there are paths from there to get your BSN and become an officer if that is something you are interested in.