Hi, P9,
I can't advise you on the show, never been in one, though I have been to a couple rabbit shows. Also, I don't know your age. I'm making an assumption you are relatively young, so I'm going to talk to you like the Aunt that I am. I apologize if you're older, but the advice is still good
You're putting a lot of pressure on yourself to that will only make you more stressed and nervous. Your birds may do well, they may not. It's your first show. Relax. View it as a learning experience. If your birds don't do well, or are just middle of the road, find out why, and what to improve. If you do get a ribbon, GREAT! But still see if you can find out what needs improving.
The judge may (very likely) list things that are wrong with the bird from a showing perspective. Don't take it personally. Go in with thick skin. It's not the judge's job to make you feel good. It IS their job to judge the quality of your animal, thus helping to improve the breed. If you have the opportunity to speak with them later, remember to be polite and non-argumentative. You are not trying to get them to change their mind. You are trying to learn. Remember that the most successful people in history also had the most failures. The difference between them and the rest of us is they did not view failure as the end of the road, they instead viewed it as a necessary part of the learning process.
When you register, let the person taking your info know you have no experience setting up at a show. Ask if there's someone who could stop by your spot and make sure you've done everything you need to do. There's a good chance there is someone like that to help out, but if not, use the people nearby where you set up.
Instead of thinking about all those strangers you have to meet, focus instead on meeting just two or three. When you swim, it doesn't matter how deep the water is, you only use the top couple of feet. Attending an event like this is very similar. It doesn't matter how many people are there. You only need to meet and talk to a handful. Make a point of introducing yourself to the people on either side of you, let them know this is your first show, and that you're nervous. The worst they will do is say "Hi nice to meet you, hope you enjoy it" and then go back to what they were doing. The best they will do is talk you through some of the things you're nervous about.
If there are other duck breeders, make a point of saying Hi. If they seem friendly and aren't busy, say something like "I'm Poultry09 on Backyard Chicken Forum. Do you ever visit that site?" It's a great ice-breaker, and there's a good chance they hang out here, too.
Are you going with a friend? Are they more outgoing than you? If so, use that. Say to them ahead of time, "these are the types of people I'd like to meet, could you help me break the ice?" Even if they are just as reserved or shy as you, the two of you together can boost your courage.
Best wishes, and take pics to share!
Tahai