Check out the SCCA's web site (http://www.scca.org), check their list of events and then go to one!
SCCA folks are some of the nicest people you'll meet, I'm sure they'd be more than happy to answer all of your questions. If you went to an event, such as a weekend at Daytona or Sebring there would be *plenty* of race cars there for you to scope out.
--Dan