Started taking crossfit classes!

Took my first on ramp class yesterday.  It’s a 4 week introduction to crossfit and the proper form for all the exercises.  I was able to do everything but it starts to kick your ass as you do more sets.  I decided to give this a try because one of the guys at work has been doing it and looks great. He kinda talked me into giving it a shot. It have lost almost 40lbs with just using Tovala meals and sensible lunches but the loss is starting to slow down so I think adding a workout 2 to 3 times a week should get me dropping weight fast again. My goal is to get to 200 and then reassess. Doctor says I should be 180 but I think that might be to low.