I feel silly asking this, but thankfully I'm anonymous here

When I started running, there were programs called "couch to 5K" which literally took me from the couch to running a 5K in less than 29 minutes in a few months. I decided to change it up a bit, bought a Jamis Aurora (I know, not a dedicated road bike, but it fits my needs), and signed up with a local road riding group (here's the group for an idea of who they are and how they ride: http://www.meetup.com/Frederick-County-Biking-Group/ ).

I'm really nervous about riding with a group. I emailed the admin of the group who said the rides are mostly road with a little tow path in there (packed dirt/gravel) Also, I've only ever ridden 10 miles max, and this group goes on 30-60 mile rides. I'm searching around the internet and finding tmi about cadence, classes of riders, etc. I've had the bike out for a couple jaunts and realized my running muscles may be getting pretty good but I have a lot to learn with biking.

Basically, is there something like a couch to 5K for bicyclists?