If you join the guard and have prior service such as yourself being in the Navy. You will not have to go through Basic Training, you will just need to find you an MOS that you can get trained in. The guard is notorious for lack of proper training. So find what you want to do and don't sign any paperwork unless you can guarnteed training.
I'm our medical section supervisor. Getting schools, not just medic schools, is a pain, they want the man power but seem to loose enthusiasm once you are in.
Being in the Guard is much differant than it once was. You have a greater chance of being called up and it does carry some prestige with it.
My suggestion, and I am biased, go 91B Medical Specialist (Medic) we don't have enough of them and can't seem to get any in. I am begging for good medics! For my battalion, I have five medics, maybe loosing one. That is four plus myself for heavy engineer battalion - with no g9**%##@509^%$##)_)_*448798**^^%* ambulance either! Now, ain't that something. Sometimes the goverments mind set just really bug the crap out of me actually it sometimes really just pisses me off...............
Jumping off soap box to return to the thread.
Seriously, we need medics and we need them bad. Give it a shot, no pun intended, it's a great job, your soldiers will take care of you and your commnand won't screw with you. You help one soldier and it will go a long ways to people watching and covering your back! IMO - the best job there is.