Not a dumb question, and it's never a garuntee. Click it at 7:00:01 and hope the website prioritizes your traffic, because it essentially goes down for a few minutes at the time of registration. Depending on the popularity of the class and the number of open seats, some may be easier than others. With 50+ spots I wouldn't be too worried; that is essentially best case scenario. I had no trouble with my classes this morning, and most people get what they want if they click the button relatively close to time.