Be careful of "crossfit" classes in the gyms!
A gym that I used to frequent had X fit classes - it was like a bastardised version of cross fit with HUGE amounts of reps, massive cardio. Basically the opposite of what crossfit is, but passing it off as a non-branded version. It was injury waiting to happen with rep sets like 21-19-17-15-12-9-6-3 of 8-10 exercises.
I've changed over to an affiliate box and its so much better, and they actually check your form and take the time to teach the movements and mobility stuff.
That being said, definitely check out the crossfit hq mainpage for their WODs.
Starting waist measurement: 36". Current 35". First Goal 33".
Starting backsquat: 50lbs. Current squat: 132lbs.