Yes it can help skin disorders/acne. According to traditional Chinese medicine, the lungs are responsible for supplying the skin with nutrients. The lungs are one of the primary organs that benefit from qigong practice. Qigong would be a good place to start.
I doubt that you would "expect" anything upon reaching the level of being a master. There isn't a straight answer for how long it takes. "Master" is a level of accomplishment in a field that is recognized by others,or one's teacher/teachers, and inspires or warrants respect. It doesn't have a fixed time or pre-established time to reaching it. Everyone, and everyone's situation is different.
