the first thing that you might try is visiting comps that are in your area...VA has comps in July and August (that I know of) you can check out info on these comps and others at:
www.dancesportsuperbowl.comOnce you are at a comp, check the program to find what studios near you are competing...and don't be afraid to talk to the pros and amateurs from your area...dance people are notoriously friendly.
Another option is to check the pro and studio listings on web pages like ballroomdancers.com! They have a great listing system. Even if there is not one on the list that is as close as you like...you can call one that is semi-near and ask them who they know of in your area. You can also look for the USABDA (USAmateurBallroomDanceAssoc.) in your area, and they may be able to help you.
Whomever you find, be sure to check their dance history...this is a buyer beware industry, and all teachers are definitely NOT created equal! If you go to an actual comp you might be able to get a better idea about the teachers in your area. If money is an issue (when isn't it?) you also want to look for a teacher who has several people who regularly compete. In general, the more students going reduces the cost accordingly. Also, I suggest that you take a look at the independent (non-franchised) studios in your area. They often give you more dancing for your money. But again, be sure to check the credentials of any instructor...competition is "another world" as you put it, and you'll need a good guide

Have fun, there's nothing quite like competition dancing!