The one thing I would stress when you're deciding on the kind of bike you get is, have faith in your own potential!
I have a comfort bike (the LBS kid called it a ''geezer'' bike, which should have been a clue

) because I never thought I would be strong enough to ride more than a mile or two.
Heck, it's two months later now, and I can ride 9 miles at a clip before I even realize it. (This week I've ridden 50 miles

Woo-hoo -- I have NEVER done 50 of anything before) and I take one road ride a week with a club I really enjoy struggling to keep up with.
Don't get me wrong, I still love the bike, but it seems like I'm carrying a Buffalo up the hills. (That could partially be me), but other riders say I'm working harder because my bike is slower and heavier.
Still having a great time, and surprising myself every day -- I'm sure you will too. --Kymberli