if there is a kinesiology dept. these classes are usually offered through it. If I were you I would drop the bodybuilding and take something like pilates or yoga, that way you could actually learn stuff, meet girls, and it will help you with your current training program.
On a side-note just b/c someone is overweight doesn't mean they do not know their shit. In your teacher's case it sounds like she is a moron, but keep an open mind in the future.