Check the CMRA website (central motorcycle roadracing association)
They have events up in Ft Worth among other places. It's a great family environment, and you don't have to race to have fun. You can also get into track days and meet great folks.
(and they have a Ninja250 class too so you can see what your bike is capable of)
Good folks... and why not get a bicycle and come ride with the rest of us, too