"Is it easier to do college while your in the coast guard or Air Force?"
"Easier" is relative. It isn't easy in either one. The USAF does put a strong focus on education but on active duty regardless of service branch you won't be able to take more than 1-2 classes at a time. That's partly because you'll have a full-time job working 40-60 hours a week including additional duties. You aren't allowed to take any classes until you're qualified in your duty position -- which can take up to two years. You're pretty much limited to distance-learning classes and those offered on base.
That said, the USAF does very much want you to get an education. They have their own community college. There are general classes offered on base and you'll get credit for tech school. If you complete a few other classes on your own you can get an AA/AAS degree form the CCAF. Getting a bachelors in one enlistment is largely impossible but with enough work you can get an associates done.
"Is bootcamp the same or really different between the two?"
The purpose of basic training is to teach you the basics of being in the military in general and in your respective branch. So in general they cover much of the same type of material; they have fairly similar PT standards; similar length of time, etc. But they have different missions so obviously they have some pretty significant differences too. Basic training in all branches comes down to two things: LISTEN and do exactly what you're told; no more, no less. The rest is window dressing.
"I know the benefits are all the same, but which would be better overall?"
That's entirely up to you. There is no one in the world who can answer that question but you. Because that depends entirely on what you want out of the experience.
"I really want to join the Air Force bad, but I hear you only can take 1-2 classes while active duty, but I hear they promote more often and have nice bases"
That is true of classes regardless of branch of service. Promotions through E-4 are automatic and based on time in grade, time in service, and being qualified in your job. You don't test for promotion until E-5. So no, they don't "promote more often". Yes, the bases tend to be nice.
"I just don't want to be 22 with little or no degree"
Well if you enlist you will be. That's part of the trade off with military service. You trade some of your time in exchange for the benefits you get. The education benefits you get are intended to be used once you are out of the service. The military trains you to do a job and that's what they expect from you -- not school. If you want the benefits that come with joining the military you have to accept the trade-off that comes with it. You can almost certainly get an associates degree from the USAF in one enlistment with a little extra work on your part. That will help you when it comes time to apply to a bachelor's program. But you won't be getting a four-year degree in one term of enlistment.
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