But... first off, how familiar do I need to be with the instruments within a standard orchestra? I'm looking at a concerto score to find 15 Staffs (staves?) of a variety of instruments, many purely ONE note at a time. Makes sense, I don't understand how I could ever play 2 notes on a trumpet :/ Apparently the Fagotti (Sorry, Babelfish reels out no English translation) can play 2 notes at the same time?!
Two notes on one staff? Probably in the conductor's score?
You need to have your stuff be playable
having someone actually play your stuff is better