Teaching myself butterfly

Hey Guys! So I've been trying to work on my technique this summer and I've made a lot of progress in my freestyle, backstroke, and breaststroke mainly because I've been working with an instructor. However, we didn't have a chance to get to butterfly, and I'm really considering joining a local club team in the fall, but I don't want to embarrass myself by being unable to swim this stroke at all. Anyway, I was hoping that you guys may be able to tell me how I should go about teaching myself and what things to really be careful about. If you guys have any videos that you think are really good, I'd love to see those too. Thanks!