Growing up I had plenty of opportunities to make something of myself but I was undisciplined and a complete mess so I threw every single one of those opportunities in the trash (switched majors multiple times/transferred schools multiple times and pretty much just ended up dropping out of college). I hit rock bottom after realizing how much money and time I've wasted and how after all that time I had nothing to show for it. 

I enlisted into the Air Force as a last resort and figured it would be a good way to redeem myself but that ended up being a lie.

my job in the AF is pretty useless. I'm not learning any skill or trade that's marketable in the civilian sector and im surrounded by mediocrity and incompetence. 

The earliest I can get out is in 3.5 years years but that's only if I'll be approved to go part time. If not then I'll have to be on full time orders in the AF for another 5 years. 

Every single day I'm getting more and more behind when compared to my peers from high school/college. By the time I get out most of the studious and successful people I knew from high school/college will have a successful and respectable career. 

Im back in school but taking classes towards a BA (liberal arts) at an open admissions university so not exactly a prestigious college or a marketable degree. 

I was thinking about doing nursing/Physical Therapy assistant/occupational Therapy assistant but I have a feeling that my academic record will exclude me from gaining admission to programs like those. 

Is there any hope for me or is being in the Air Force for the rest of my life the only option I have left?