What advice do you have for a prior-service Infantryman who wants to pursue an education and become an Officer in the medical field?

Nursing

Sounds great. Pursue your dream. But you must hurry as there are probably age limits in some fields. Many medical fields can also apply for direct commissions for example registered nurses and doctors and dentists. Depends on field and needs of the service. Never give up your dreams.

I was prior service Military Police and Corrections. I wanted to be an MP officer. I was broached Field Artillery. Needs of the Army come first.

Biggest question is what do you want to do? Many changes along with funding are changing with Defense Health Agency (DHA) taking over and you are most likely years from a nursing commission. Direct commissions for med-surg nurses have been significantly down and your best chances there are coming in with a specialty. Best bet is PA or medical school with the unknown direction of DHA.

Others have already mentioned direct commission. For medical career and your situation, it is probably the way to go. OCS and ROTC may both be difficult because of age limit.

Long term good decision and worthy the pay

http://www.usphs.gov

Look up Jr and Sr COSTEP under USPHS...elaborate on associates, bachelors, grades, GPA, which field(s) you'd want, I can suggest a good deal.for you, I'm doctoral.allied health, total perm.disabled,.we shut my life we sell yrs ago, honest, the more you relate, the more I can suggest...if you'd be willing to go psych related, USPHS has an interest agreement to let USPHS serve with triservice for 3 yr tours, I get what you want, honest, I wanted to go UzsPHS, I trained under an O-6 of theirs during an externship, it's depend on what level you want, what field, go into hobbies, reading g I terests, sports incl martial arts, so I can gauge your mind, ok? I have an interest in such career/educ stuff, I always ask for that so as to suggest things, esp.for those who want clinical, I trained at multiple VA hosps, also, I've been around enough I can suggest stuff, just give me enough to be able to fathom your mind more, as I'd said, no rush, whenever you want, ok?