Hmm, well, I play keys also, and I've been where you are now. I am a female, and not only am I a female, I play amongst very talented musicians. So this came up plenty of times. When I first started out, I always felt like I wasn't supposed to be there playing with them. I didn't rank myself as being close to good as them at all. Well, with time, I just learned to accept the fact that as many times as I made mistakes, they did too. And of the many songs they knew that I didn't, I knew some too. In saying this, there are many great musicians, and you're going to come face to face with a lot of them. But remember this, there's always something that you're going to be able to teach and learn from each other. No matter what level or how much expirience each of you have. Be humble, stay focused and concentrate on where YOU'RE trying to go.