CAP can be a hot mess, and a PITA to deal with. I stepped away after 14 years of mucking with the nonsense - BUT: it may be worth looking into, IF you find a squadron with an airplane, AND it isn't gacked up by silly nonsense and poor management, AND you have enough PIC time (it used to be 175 hours) to train for mission pilot, AND you pass the MP checkride. Then, IF the wing in your state isn't a cesspool or a good ol' boys club, and has some missions, then you can build some time flying for free - you'll need to make yourself available, and they'll (usually) want you to take on other, often pointless, "duties", as well.
All that said, I have seen low-time guys build significant hours flying CAP. You'll need to shop squadrons, asked around, find out the political environment. They often have a hard time keeping enough qualified MP's, and/or putting 200 hours on each airplane annually, and that's directly attributable to the bureaucracy and institutional confusion. Two illustrative extremes you can look at:
http://captalk.net/ (CAP can do no wrong)
https://auxbeacon.org/ (CAP can do nothing right)
CAP has had some pretty sketchy ethics issues; also some good folks. Pilots vary from low time PPL to ATP and military pilots, and everything in between. Take a look, bt be wary.
