Ok, it can be a bit tricky to find a site if you don't know where to look.
Use that as a start for google fu'ing a nearby site for you.
My advice when you go to your first skirmish, ask questions as most people (bar the a*s holes) will be very happy to answer any you have. Get a look and a feel of as many guns as possible, if you enjoy the hobby there is a good chance you will want a gun or 2 (or in my case 10) of your own, and the more guns you get a hands on look at all sorts of different guns and know what you liek and what you dont.
One last thing a really big don't for a newbi.
DON'T think you know better than other people, yes you may but if they have been softing for a while there is a good chance they will have a pretty good idea what they should be doing (it really hacks me off when a rental starts to tell me I am doing it wrong).
Now on a posative note, most people you meet at a skirmish will be very firendly (if a little rough around the edges) and will be more than happy to help you in most ways.
Hope that has helped.
Abbadon101