Re: Surgery for Femoral Anteversion
I see that you haven't gotten any replies -- I doubt this is a common surgery. Last night after reading your post, I Googled femoral anteversion, thought "oh, I think I have that", then told myself I need to quit self-diagnosing. Today, at a post-op check-up, my hip surgeon had another surgeon shadowing him. He remarked to the shadowing surgeon, "Note the femoral anteversion." So, easy enough to go undiagnosed while visiting multiple orthopedic surgeons for a variety of hip issues.
It sounds like the majority of troubles are in your knees and ankles, which may be to your advantage. Since you have some time, I would suggest trying some other things. First, I would aggressively pursue physical therapy. It will not change the underlying skeletal and joint issues, but you can strengthen the supporting muscles. The physical therapist can also let you know about how to change your body mechanics to avoid injury. If you do have surgery, your muscles will be stronger and that will make recovery easier.
The second thing I would recommend is getting fitted for medical orthotic inserts. (Don't use the machine at the drug store -- go to a podiatrist). The orthotic inserts will help your feet to find their best positioning.
The third thing would be to get fitting for knee or ankle supportive braces. You don't want to wear such braces every day, because you want your muscles to continue to engage, rather than solely relying on the brace. But, for strenuous or new activities, braces may be helpful.
Fourth, and I only mention this because you indicated you wanted to be more active, if your BMI is not within the ideal range, you may want to consider weight loss. (I don't know your situation, and I know that teenagers struggle with body image, so please don't take this personally. If your weight is a concern, talk to your doctor about whether you are medically at the right weight.) I realize that getting active is part of the equation, which is so, so difficult if you are in pain.
Fifth, in your quest to be more active (good job!), be careful. The typical guideline is to increase your distance/time by ten percent per week. If you can comfortably run a mile, add another tenth of a mile per week. It will add up quickly. You might also want to mix up activities, like running one day and biking other days. This will allow any stress from the impact to resolve before running again. If you have access to a pool, you can also try swimming or kicking.
Finally, I would talk to your parents about health insurance issues. You might not be covered if you are not a full-time student, and you probably can't be a full-time student with such extensive surgery. You will probably also need to get pre-certification, so be prepared for a fight with the insurance company.