There are two gun clubs in the OKC-Norman area. The first is the Oklahoma City Gun Club. The other is Tri-City Gun club. Last I knew, George Duggan was running the matches for Tri-City, but that might have changed. The Oklahoma State director is Jim Fields and he can be reached at 405-721-2186. State directors love to field calls from new shooters, so feel free to contact him. I shoot at Young Hunter's Safety just west of Wichita KS. If I can be any help, drop me a line at mabarb@cessna.textron.com
You will find that silhouette shooters are some of the nicest people in the world. My suggestion would be to show up to a match with whatever you have to shoot and have a ball.
7br aka Mark B.