Yoga Resources for Recovery from Eating Disorders
If you would like a very gentle start to your yoga practice, I recommend the book yoganap: Restorative Poses for Deep Relaxation by Kristen Rentz. It contains restorative yoga poses, designed for complete relaxation. The author is a professional during the week and a yoga instructor on the weekend. Her instructions are easy to understand and the exercises are totally doable. There are even some poses you can do from your desk at work!
For further reading, you can explore the Yoga Journal website at http://www.yogajournal.com/.