u/Every_Lime8111

I'm wanting to buy a tuba but I don't know what kind to buy, I want a Bb tuba but what is a good brand. I have been playing for a few years and have had a school owned one the entire time but I would like to own my own(I'm willing to save to any amount of money) currently 14 and 5'5 and skinny but prefer on playing a 4/4 or bigger

so haw can I help increase my air capacity as a tuba/sousaphone player