I've never taken a class, but I meet up with a quilting group at the Senior Center every chance I can (I'm 38, the oldest is 101!) They are a great group of women, all very helpful, with many different backgrounds. It's fun to just go and share the quilt experience with others, learn new things together (either just new to me, or maybe watching someone else learn something new), and have it be low pressure. Some have some very nice machines, but they also appreciate the simple ones.
Maybe instead of classes there is a group you can find. Then, if you are tempted to try a class again, you may have someone to go with you to make it more enjoyable!