Jenny, it's natural to be nervous. You'd be surprised how nervous even experienced runners get. One thing is for sure, though: no one will be 'looking down' on you, especially at a fun run. Quite the opposite, in fact: everyone will respect you for doing the event. Of course, you won't be the fastest runner there and (without knowing the full nature of what you're doing) it's likely there will be some very fast people doing the event. But pay them no mind. There will also be some people, I'm sure, with all the 'right gear' (whatever that is) who finish maybe slightly ahead of you, about level with you or behind you. To my mind, the only gear that's 'right' is the running shoes - it's worth spending money on those. All the rest is really up to you. We also don't know how much training you've done, if any. Bear in mind that the temptation is always to start too fast as you see others speed off. Rein yourself in and take it easy, assessing how you feel every so often - whether you need to slow down or even stop, or if you can up the pace ever so slightly without killing yourself. Listen to what your body tells you. And if it's a fun run, there'll be people there encouraging you. Just be determined to enjoy it and all will be well. Good luck.