NO way!! It didnt seem stupid at all!

I had my first dressage test a few months ago and completely know what its like! I did the prep 2 test and did horribly.. but still had a ball! My pony whinnied through the center line, stuck his nose in the air the WHOLE test, and point blankly refused to listen to me. Trust me, you cant get worse than THAT! hehe.
Besides the nerves, it really is a fun day, and great experience. If there were no such thing as butterflies in the tummy then it would make things a whole lot easier!
Good luck :) You'll do great. Just remember not to hold too high expectations for your first go. Having a laugh after is almost the best bit.