Hi Tyler, and welcome to ECF.
I'm a relative newbie as well, but thought I'd offer my advice. I went with the Riva 510 kit from Liberty Flights. They seem to be very popular here. Long battery life (I was a lighter smoker than you, but I've yet to have a battery run out) and compatible with 510 items. Liberty Flights is well thought of here and my experiences were great - not my favorite juices so far, however. The Riva is about the size of a pen - it won't look like a cigarette but I found that was less important to me than I was expecting.
As for cartomizers, I'd recommend the Boge - with the Riva you can use the Low Resistance 2.0 ohm model, or you can get the 3.0s. They are easy to fill and hold a decent amount of juice. I've also had good luck with some dual coil cartomizers. You can get the Boges at Liberty Flights.
As for juices, I'd just get a bunch of sample sizes to start. It's fun to mess around. I ordered a bunch of tobacco-ey flavors when I first started, and pretty quickly found that they didn't appeal to me as much as some of the other flavors. There are tons of juice places - I can personally vouch for great experiences with Vermillion River, TastyVapor, and Good Prophets. Not to say I liked every single juice, but their delivery speed, packaging, and product quality are all good. They are also well thought of here. Good Prophet also has a really good price on the Boge cartomizers.
Just my .02.