Complete Newbie!

Hi there. I am a complete beginner but diving right into this triathlon thing after years of contemplating it. What took so long? Well, I didn't own a bike and didn't know how to swim (at least not for exercise or competition). After recently reading a bunch of Tri books I decided enough is enough. In the past week I have taken two, very successful swimming lessons and located a perfectly sized used road bike to purchase. (And, if I am honest, spent hours googling in search of an inexpensive wetsuit, bike shoes, bike shorts, among other things!) I'm already a runner with 6 marathons under my belt...so that piece of the puzzle was already in place. I am a bit overwhelmed by the amount of information on this website...but I have so many questions I figure I'll just jump in. I am a 33 y/o female.