Ive been studying jazz on the bari sax and soprano pretty seriously now for 4-5 years. My main instrument ( for big bands, mostly) is the bari. However, I am a 15 year old girl and am quite small, 5'1-5'2 and about 93lbs. One of the problems I encounter is getting enough air into the saxophone and not playing loud enough. I have tremendous lungs already, but my size is kind of an obstacle. Any tips?