Honestly, just get up there and do your best. The best teacher I ever had cast me as Julius Caesar in almost the exact same setting. She believed in me. I believe in you. Tomorrow might be difficult, even embarrassing. But the more you use your voice the easier it will get. You’re already braver than you know for not backing down from this role. The Bard would be proud. Tomorrow is an investment in yourself that will pay dividends the rest of your life. It’s not the same play but: “This above all: to thine own self be true!”