Danni, it's my first too and like you I only managed 14 miles as my longest due to injury. I'm anticipating a time similar to yours but am going for the "run 11 mins, walk 1" strategy from the off to try and conserve energy. thought I might follow the 11 minute milers to begin with and then see how I feel in terms of either going up to 10 min miles or just doing a "get your round" strategy.
What's your number and what start/pen are you in? I'm 40712, red start, pen 9. If you're there, we can look out for each other and try to go round together for some/all of the time maybe?
Us marathon virgins have to stick together!
Any support from RW forumites at mile 17 or anywhere else will be much, much appreciated. Thank you all.