Hi all, I am about to begin my senior year at a large aviation university. I am a commercial aviation major and will have CPL AMEL/ASEL + CFI/I when I graduate. Up to this point my plan was always to go the flight instruction to regional route. Recently I have begun to reconsider however. The chance to serve and experience the type of flying that the military does is starting to appeal to me. Like everyone else, my preference is fighters if I can make it, but flying multi engine heavies would also be fine. Helicopters also have a certain appeal, but my ultimate goal is the major airlines. I have several questions about the ANG, USAF and USN. Firstly the air guard.

I understand that you simply apply to the specific unit. If selected, you attend UPT and have a guaranteed airframe, correct?
What is the best way to be selected?
Are fighter units more competitive than airlift units?
What happens to the pilots if the unit changes missions to UAS operations?
As far as USAF and USN/Marines, what is the usual breakdown of airframes out of primary training?
And can I attend OCS with a guaranteed flight slot?
Or will I have to compete for it in some way?
Which one has a better chance of flying something with a pointy nose? And lastly as a general question, how much will my current experience help me in flight training and with selection?

Thanks for your help ahead of time! I appreciate any answers you can give me