I have spent 23 years in the USAF, and I have two associates degrees and one BA degree in Criminal Justice.
The way the Community College of the Air Force works is you get credits for your Tech School and other things you will do such as your 5 skill level and 7 level course and your PME schools that you Attend.
As far as going on to school the Air Force pushes their folks to get higher degrees. Depending on the AFSC ( or job) you pick, you can go to school. Some jobs such as Security Forces and others it is way harder to get to classes.
Most Air Force bases have college classes on the base one of the main schools is the University of Maryland they are everywhere and including overseas.
I am a Combat Controller ( special ops) type and deploy alot so it took many some time to get my BA, and plus to be honest it was not high on my ticket in my first eight years.
Most jobs such as Medical I have seen folks that go to noon time classes with their supervisors approval.
I have seen alot of folks who come in for the education and then don't stay on track so they don't get any type of degree.
I wish you all luck and hope this helps with your question.
If you have any other questions please let me know
P.S. Also CLEPS and DANTES tests are free to active duty military, these test cost anywhere from $75 and up in the civilian world