Ok, let's just take this all one step at a time
If you smoke a lot you'll want a lot of battery life. This means a "cig style" ecig simply won't have enough battery life to keep up with you. So that throws a lot out of the water right off the bat.
My next suggestion would be to look at what's called an eGo. Very popular and well performing ecig with enough battery life for most of us. I recommend getting a kit with at least 2 batteries as you should always have a back up. I would also recommend getting a kit that starts you off with something simple like a basic cartomizer or maybe a vision ego transparent clearomizer.
http://www.nashvillevapor.com/site/products-page/starter-kits/the-ego-dual-coil-cartomizer-kit/
there's a good starter kit for a good price. Should be simple to use/figure out for a newbie. I recommend that vendor a lot because they have great customer service, low prices, and fast shipping. Don't remember if that kit comes with juice or not but if it doesn't he sells juice right on his site.
If you have any questions about the juice feel free to post up with your questions and good luck