It's your first show! Who cares how it goes? My first show, I jumped the wrong course and lost my stirrup. That's what first shows are for. They're about having a bit of fun and being a bit competitive, but they certainly are not about judging people who have never done one before. I'd use it as a learning experience. Like a horse's first show, if you happen to win, great but the first one (or two, or three) is just to get you used to the ins and outs.