Don't be put off by what you might consider a poor showing at your first-time out...anybody who shoots in competition's been through this...you can only get better.
Hang in there, and shoot as many matches as you can. Don't listen to all those guys telling you to "Just go out there and have fun.". They just say that because they want to keep beating you.
It AIN'T fun until you feel happy with your performance...and that won't take you long.