If she wants to lose weight and gain confidence, she needs to get to a crossfit affiliate with qualified trainers who will walk her through the fundamentals while instructing her on workouts that are manageable, yet challenging. Moreover, the support in crossfit gyms, for beginners, intermediate and advanced, is world-class.
Although, as most of us have learned, it is discipline in the kitchen and at the table that truly leads to weight loss. Almost impossible to out-train a bad diet, unless you are using steroids. She should check out Dr. Eades’ website (proteinpower.com I think) and robbwolf.com for nutritional information. Low carb will get her there, if she can make it through the first little jolt…
As Coach Rippetoe noted, he has never seen anything better for fat loss than crossfit and the zone diet. I echo his sentiments 100% in terms of fat loss. Unfortunately, it takes a lot of discipline, suffering and hard work.
IMO, someone without any level of fitness should not self-help with crossfit. Find a good affiliate and talk to the trainers for a while to ensure their qaulity.