You'll do fine next year. You can make your practice more realistic by shooting just a single arrow at your target. Or make each shot at a different distance. Ping pong balls are fun to shoot at. Hone your confidence, so there's no way you feel you can miss. Practice on rabbits, which should still be in season. When you can pick a spot on a rabbit, a deer is a piece of cake. You can shoot, just need some confidence. My money is on you.
George