Yikes - no clue about cycling and you're the leader? That's quite an undertaking! Start slowly - you need to slowly get your body used to riding. See how far you can ride comfortably, then add 10% to that per week. How long will each day's ride be?

Make sure you get properly fit to your bike. Leg-length discrepencies can cause problems, so make sure that's addressed. Read every thread on the touring forum!