buisness proposals? eek

Okay - so this Theatre troupe Jer and I are part of.... Encore - chad sent me a proposal and I sent it in to the Principal at the school i went to. I then set up a meeting with the Principal to discuss said proposal and try with all my might to get her to say yes and let us perform with the kiddies to make them and us some serious cashola.
a) I've never done this before in my life and am scared shitless
b) what the heck to I say
c) who am I and when did I switch from being the supposed "stay at home mummy" to this?

not sure if I'm ready for all this....