Welcome to our forum.
I see nothing wrong with admitting you're nervous, just let the conversation flow naturally and enjoy your date with this new person. If there's any way we can help on this site we're here; post your questions and concerns, and have a look around. You can do a search and a tag search for specific subjects.
I wish you the best, I know any first date is scary!
Love means never having to say, "Put down that meat cleaver!"