Lively, intelligent, and quite immature, [Emily] usually burst out with exactly the comment that summed up the situation beautifully and therefore could never in politeness be said. ↗
The nerves are a problem on trumpet, because when you mess up everyone can hear it. Just remember most people are too polite to say anything about it. That should calm your nerves. ↗
Sometimes if you have very confident people, you have to tell them please, be polite, there are other players are good enough as you and you should never speak out of an orchestra. ↗