There are clubs in every state. I'm part of multiple clubs here in Oklahoma. Search the local area forums, a little further down the main forum. Not all clubs require things like CB's or fire extinguishers and a fee to be considered "in the group." Check Facebook for jeep groups and off road groups. And don't be afraid to join groups because you are young. I was 18 not too long ago and when I joined some groups I found other teenage jeepers to offroad with; even though the older ones didn't scare me, it just felt better being around people my age.
And I would never go wheeling alone. Always have at least one other vehicle with you that could keep up with you on the trail.
Oh, and post some pics of your Jeep!
Almost forgot, welcome to the forum!