I'd even go so far as to say you don't need clip on bike shoes for your first triathlon at all, especially a sprint. Just focus on getting used to cycling in the first instance then upgrade later once you've picked up what is/isn't worth it from your new friends at the tri club.
I've just started creeping my way into top 10's (literally,10th lady, twice). This is excitement enough for the moment. I think I would explode with excitement if I won anything outright, and insist on giving a really long speech where I thank everyone I have ever known, while crying.