Hey chris,
i agree with what most people say here about just riding more every week until you get there. Now if your goal was to make it in less than 3 hours then that's a different story.
Also, dont commit the same mistake i did of doing a solo around the city streets and go for an organized metric as ur first. My first one was a nightmare, it was about 3 weeka after i started riding and didnt know any good routes so main roads in the city with tons of crappy traffic made for an intense and very bad 62 miles.
Good luck and have fun!
Luis
__________________
Cat 6 going on PRO....