I want to do Yoga! Where is the best place for a beginner?

I suggest Yogasana. I started there two years ago and feel like I've learned a lot. They are very good with beginners. They even have a free beginner class (class fills up fast). But even if you just start going to Level 1 classes they'll coach you along. All the teachers are good about giving one-on-one correction in a kind way.