There are a number of sites you can visit to learn about matches in your area. The best way is to just go, shoot, and talk to people and make friends. Other shooters are extremely helpful and are always willing to help you out and let you borrow anything you need.
www.boomershooter.com has a lot of competition shooting information. So does
www.brianenos.com. Remember, everyone was a beginner at some point and they had to ask for help also.