All of that is awesome advice. I did my first 10K last summer in 79 minutes. I was nowhere near last, and it was a lot of fun. I'm doing my 2nd on Sunday and judging by the times I've seen from the last race, I'm going to come in dead last. I'm dreading it, but I'll let you know if it's the Worst Thing Ever. The important thing is getting out there and improving over time. Sounds like you're right on track.
Oh - and one more tip... If you're used to running alone, you're almost guaranteed to get caught up in the crowd and run your first mile or 2 much faster than you're used to. It makes the back end of the race much harder. So, try really hard to keep your own pace. Time it, if you need to, to make sure you're not going too fast.
Good luck

- let us know how it goes!
cheers!

paula