TO: The DCA program is for guys who have completed military flight training with the other services and are interested in joining the CG.
It sounds like you are in college, so if you want to join the CG you would need to talk to a recruiter and apply to Officer Candidate School (OCS). OCS is an approx 4 month school to learn how to be military and tell time in 24 hours instead of 12.
During OCS you could apply for flight school, and you might get it, or you might end up in some other CG billet as an O-1 (Ensign). You could continue to apply for flight training as long as you cared to if you didn't get in right away, until you hit the max age (which you never know, it could be waived too). You would have an obligated service commitment from OCS, which I'd guess is 5 years, it could be more, could be less, I don't know. (I retired almost 6 years ago and I was an Academy puke. I'm sure things have changed since I left.)
You should also realize that a pilot in the military is an officer first (lots of paperwork and other BS to put up with, you will be expected to do other, non flying duties) and doesn't involve as much actual flight time as you might wish. There are certainly benefits and it is a rewarding career, but remember the SERVICE aspect of being in a military service.
Anyway, if you are interested in OCS, you should make sure you get your entrance physical from a CG flight surgeon and make sure that you are physically qualified for flight training if that is the only type of job in the CG you would be happy with. That way you would know going in if you were eligible for flight training, and any waivers for vision (which the CG is fairly lenient with when the need pilots) that you might need would have been granted in advance.
There is still a chance that you wouldn't ever get flight training (even with all the physical aspects taken care of) because it is a competitive process that you can't control (other than to perform well in OCS and at whatever job you end up in at your initial unit) and might take several attempts to get through. There is some risk of never getting into flight training and having to serve as ship board officer until your commitment is up.
It is definitely worth pursuing, but make sure you get with a current, fairly junior CG pilot who has gone that route to get their ideas on the whole process.
Good luck.
FJ