The problem with this is that by using the word creepy, you just planted a huge negative connotation right off the bat. The first adjective you tie yourself to is creepy, and as they say, first impressions count. If you're good looking, charming or very good at joking around, you can work past this, but it's plain not a good idea.
However, if you wanted to signal your anxiety in a friendly way, I'd say it's perfectly fine to use neutral words, like admitting how nervous you are. Still, it's best to try your best to appear confident. If they see your nervousness, they'll appreciate your effort to put on that courageous face.
