Why don’t you do larger group sessions?
People can be at different levels even in a beginner class. Some yoga positions may be difficult for a person to do if they have chronic pain or just haven't been active for a while. In a private or small group session, your instructor will make sure that you are able to do each position properly.
Melanie Schorr shows you how to do Child's Pose in this informative guide.
Melanie Schorr gives you step-by-step instructions on how to execute Camel Pose.