Congratulations for investing in what sounds like a marvelous horse! You are being really smart with having a trainer work her and sound like you have a great plan! Your barn-mates sound rude. Pressuring someone to ride when they or the horse is not ready is rude, unsafe, and stupid. I don't know why people do that - I have experienced that as well, with young horses mind you. People love to push their ignorant opinions but have no idea what is best. You do. Ignore ignorant people. Good luck! Keep us posted on her training!