I am interested in joining the Army. What MOS would most benefit me during and after service?

It would behoove you to use that EMT experience as well as ask for a "college Kicker" to supplement your income. Ask the recruiter if there are any other benefits to becoming a Medic as well. I suggest not signing up until the beginning of the month as that is when they have more available. Right now they have a "quota" to fill hence why they are "pushing" the whole medic and Infantry MOS. Although there is nothing wrong with either MOS just make sure that is what you want to do for your "career.". When are you thinking of joining and why? Just curious...
Corpsman
Iraq
US Navy

Today, most young adults will hold many jobs and change careers 5-7 times.
Thats why ndividuals need to gain a deeper understanding of their strengths, interests, and values, and how these relate to potential career paths. This involves tools and exercises for self-assessment, exploration of different industries and occupations, and aligning personal aspirations with career choices.
A place to start is by asking yourself, "what kind of lifestyle do I want?"
Then think about the income it will require to acheive that lifestyle.
This can be a beacon for one to use in determining what career / job choices will move you toward that goal.

Yes now n the Navy instead and be a corpsman with the marines

Don’t get too caught up in MOS. It seems by the question that you’re young? The biggest career benefit from a military start is experience. Not the career type, the life type. Let your curiosity flit around. You get to have a stable job while trying out different hats. I left my job as an auto detailer to serve as a Navy BM, and ended up a research biologist. It was my experience and the people I met during service that helped me find my way, not my training on how to use a paint brush.

Like college, don’t even consider your post military career until late in the second year. You’re trapping yourself. Get some new experience, meet new people, hear new stories, and then follow your passion as it is at that point. If we all did what we wanted to do when we were kids, space would be littered with the corpses of less than capable astronauts. Be open to change.

Have you taken the ASVAB yet? Unless things have changed, you scores are going to dictate what you are eligible for.

Depends on what you want to do for the rest of your life. If you have a career interest, I suggest you use that as a target. If you make to stay pick the field with the fastest promotion if career is all you are looking at. I got a commission and aimed for Mapping. Wound up getting Supply & Services and a background with Civil Construction, and Combat. Stayed with the Topo and Construction through the next thirty years. Not a definite answer but you are the wildcard here. Mapping & Construction helped me a field with Natural Resources that I still work in after retirement. Used Active Reserve as an IMA and got a lot of assignments. They could not get the skill on an easy basis but often needed it for short assignments. Lead to where you could get registered as a Land Surveyor and a Civil Engineer Technician. Supply bolstered the other skills as ancillary, but proved invaluable to support the others with knowledge. Combat Engineers helped me understand a lot but I really did not want it any more than necessary. It will be what you make it. Do not be afraid of new new experiences and learn from them. But do not hang around to get burnt either, out of pride or what ever. Good luck!!

QUESTION.. - Isn't Rally Point for Active or Prior Service members? If so, how can this individual who is not in the military at all make a post to this web site? Just wondering?

Are you looking to go active duty or reserve? What are your future plans. What do you want to get out of the military? Can’t really give you advice as to what direction to go unless we have that information. What was your ASVAB score and what jobs do you qualify with the score? Recruiters are going to push you to the positions they are needing to fill and not always the one you want. I wanted to be am MP when I first joined many years ago and they told me to go infantry security forces as it was the same thing as an MP. Definitely wasn’t just like an MP. Spent many years as a grunt in the infantry.

Choose a job that you like, that will make your time in service a little better.

Irregardless how long you serve in the Army, you need to be considering what will you do upon leaving it. You also should consider the cost of getting a college degree in a field that has no relation to what you did in the Army. I would suggest you look at the communications, intelligence, aviation, and law enforcement career fields.