Hi Itspeaks,
I think you should go for it. Whether or not you get it, you'll at least have gotten your first interview out of the way. It's going to be a lot more anxiety provoking when you actually need the job. You don't seem to really need this job so it will be relaxed. You'll be fine. Good luck!
By the way-I've always wanted to ask you this- with your screen name, What speaks? Ever since I first saw your name-it's been messing with my mind. Please let me know if it's not too personal. Thank you!