Susan,
Even the BEST Qigong master's cannot change the laws of life. We are born, we explore, we learn, we grow and in the end we try to leave this Earth a better place than what we found it.
I'm not into show biz, I can understand how look's can play an important role in your career (initially) ... show biz can be cruel and challenging.
I've seen many actors/actress's in my lifetime (Big screen). Not all were considered to be great of good looking. What they had was talent to make one believe in the role they played. That to me is success!
True beauty begins from within and blossoms externally. Your thoughts about yourself can and do make a difference. You could try all that plastic surgery stuff ... but for what? To buy some time. Accept yourself for what you are.
This brings me a point regarding change. Life is about change. Could you image life if we ate the same thing day in day out? Pretty boring. Life changes to remind us that we should change and accept the passage of time we travel.
I think the best advice is the one you mentioned. To get physically fit when your body is able to. Will this completely get rid of cellulite, wrinkles, pores and such. Probably not. What it WILL do is make you feel better about yourself!
When you feel better about yourself, you'd be amazed how this can affect your life and yes, your career!