Welcome to the boards.
Oh yeah, you gotta try it!!

Oly's are a lot more about pacing and getting into a rhythm, but they're pretty fun! And of course you can walk part of the 10K! Set your watch for run/walk intervals and you can cover the distance just fine (although adrenaline might just have you running the whole time). I actually prefer the longer distances because my HR can settle down and I feel like I go more at my stride (as opposed to sprinting all out for an hour and a half). Be prepared to be out there twice as long (or more), and work your nutrition plan around the longer time frame.
Haven't used this specific training plan for the oly, but have used the same type program for longer distances and I like it for them.
http://www.trifuel.com/triathlon-tra...n-Training.php
It's a 16 week program, but you've already been training, so you could just start 6 weeks out from race day and you should be fine.

Here's another program I found at trinewbies.com that's a 10 week program. Never used this one before either. http://trinewbies.com/tno_10wOly.asp
I'm sure other ladies have some great plans suggestions as well.

Oh- and good luck at your sprint this weekend! Please be sure to come back here and tell us all about it when you're finished (we love to hear race reports!)