I felt that the guys in my UPT class with aviation jobs and 200+ flight hours (commercial) had an easier transition during the first few months of training than I did (ppl only). The month that I spent figuring out what a fix-to-fix was was spent by those guys actually learning the stick and rudder stuff.
Keep in mind that the active duty service commitment for UPT is 10 years. Think hard about that. 10 years. Military flying is really more aptly called "deployed flying" especially if you want to join the airlift world.