If you're going to hang on to the CX bike (sounds like you got a great deal, so why not), you should try your hand at some Cyclocross racing
The FLCX series holds events all over the state and is really beginner friendly. We have some really talented riders in the series, but even an OS&P (old, slow, and poor) rider like me has a great time
The season ends next weekend with the State Finals at Little Everglades Ranch in Dade City, but it will pick back up in the fall. Check out
http://www.flcx.org or the Florida Cyclocross Facebook page for details.