Congrats. I do love the vapor smokes, and have decent luck identifying that the feeling of "smoke" entering my lungs is a major part of my addiction. I find it too easy to slip up when I do that, though. For those who are stronger than I am, would you mind posting your experience here? Product Recommendations, Price breakdowns, etc...
P.S. The fluid one uses is mostly vegetable glycerin with flavor and nicotine added. I know a couple of people who saved a shit-load of money making their own.
Mods
I used the iTaste MVP ($45ish) its a variable voltage and is all self contained so no batteries to buy. This means if it goes dead you have to plug it in but it lasted me all day so I just charged while I slept. It's nice cause $45 is all there is to spend no batts or charger.
Tesla mod ($70ish) which is variable voltage and/or wattage. You have to buy 81650 batteries ($8ish each and have at least 2) and a charger ($25ish). Expect to be into this one about $125ish.
I liked the variable voltage/wattage stuff just cause I could adjust it based off the tank/juice combo I was using.
Tanks
I tried cartos and iclear 16s and 30s and like the bottom coil glassomizer stuff best, with the iclear 16s being second.
I specifically used the Dbox Puritank ($15ish) with protank heads, would recomend having about 3 tanks on hand as you will drop them or sit on em or something to tear them up. The plus side is you can google around and buy just the bases for a few dollars when they start leaking.
So expect a MVP with 2 puris to run $75ish or a tesla with batteries/charger and 2 puris to be $155ish.
Add $15 for 5 spare heads to either one of those, but heads are also consumable so you'll be buying them as you go. I was getting 5-7 days per head.
It's expensive to get started but just figure what your habit is costing you now (mine was around $200 a month). And while I gifted my kit you can always sell it when you're done to recoup some costs. There's a vaping classifieds sub-reddit on reddit.com if you want to consider used mods and save a few bucks.
Juice.
My favorite vendor by far was
http://www.virginvapor.com/ the bed of roses is awesome!
A close second is
http://thevaporchef.com/I liked a 50/50 PG/VG blend but that's personal preference really.
There's lots of forums and a few sub-reddits with tons of info. It can get really confusing though.
Ohh and for the weight issues you might encounter I used the loseit! app on my phone. Managed to drop 60lbs while quitting, no it was not easy. My fitness pal is also another highly recommended one.