I didn't do the dishes for a couple of days. Today I forced myself to do them despite that fact I didn't feel like it. It was hard at first, very hard. But it got easier once I started. Now I feel even motivated to prepare something to eat, which is something I haven't done for at least a week. I've noticed this pattern over and over again; getting started is always the hardest part, but once you've started things get easier, and you become motivated to do other things as well. If the resistance is powerful, and it can be at times, I know that, maybe start with something at home. Force yourself to do something easy. This may feedback a positive energy to you that will help you go to the class.