My very first CQB match was shot with a non-res M1 Carbine. It was a lot of fun and a big learning experience. I belong to the ORA, and although I don't get out to matches all the time, you couldn't ask for a nicer bunch of people to be beside you on the line and run the matches. That first match of mine, I had no pistol at the time, and another competitor was kind enough to lend me his para 1911. Really great crowd.
CGN member Maritimer might be worth a contact to help you get involved in joining the ORA. You will hear this from some of us "that the M1 isn't as fast on he controls/reloads, so don't expect to come out crushing matches." As long as you are safe, you will have fun.
First you'll crawl, then walk, then after you'll run.
Feel free to send me a PM and I can also assist to get ya started or put you in touch with the right people.
Hope this helps