Welcome to ECF! I was pretty confused too when I first started, but once you get your kit in front of you it will all come together, don't worry too much. You've made a great decision, one that is both healthy and delicious!
I suggest checking out the
thread
The Wonderful World of Vaping: An Illustrated Guide to E-cigs (Part 1 of 6) and the other 6 paged that go with it. It really cleared a lot up for me as I was trying to get into it all.
I LOVE the eGo, it's a pretty simple model with great results, a battery that lasts for days, and compatibility with just about anything. It's my current PV (Personal Vaporizer, AKA E-cig) and I'm really happy with it. You might want to check out some ejuice vendors, it's really easy to refill your Catridges/Cartos and makes vaping even cheaper, and the flavors are to die for. Just about anything you can imagine is possible. I suggest
VaporBomb for general flavors, and
BackWoods Brew for Tobacco related flavors. Imitation Cigarette flavors are (In my opinion) terrible, probably because cigarettes taste terrible (You'll see what I mean when your tastebuds come back!), but some Juice Chefs make great Tobacco Flavors if that's what your jonesing for - I'm actually vaping AppleWood Tobacco from Backwoods Brew right now!
Finally, I highly recommend checking out
Doctor Vapor's Youtube Channel, it's extremely informative and mostly geared towards new Vapers, he helped me a lot in my early days.