Basically you will be cast for being you, so don't try too hard. Let it flow. Feel the moment and interact with the other actors. DON'T try to create a character (sorry GF). That will come across as phony and pretentious.
As a veteran (cough, cough) of 20 community theatre productions, we're amateurs, so just relax and enjoy the experience.
Whoever exalts himself will be humbled, whoever humbles himself will be exalted - Matthew 23:12
