That's great Crz. Glad to hear you're so into it. I've never done anything even remotely close to that but some of my friends do 5ks and a friend of mine bikes like a crazy man (around 100 miles a week). I'll be rootin for you to finish, and with a time you like, but the fact that you're doing it all makes you a winner in my book. Cheers to your health and the fact that you enjoy doing something as healthy as that.
Can't wait to hear how it goes!