Start at the beginning.
Like most have said above, get an "average" e-cig, maybe Variable Voltage so you can adjust the heat level, and some cartomizers and/or clearomizers and juice. vape for a bit. See vendor list on the first page.
I'd either A) get a kit with 2 batteries, or B) a setup with swappable batteries and a charger. You have to hunt around.
Vape for a while and decide on further options. I actually don't recommend that you get a real high priced system to start out since you're just exploring vaping and don't even know if it will work for you yet. It isn't for everyone (although I contend that 99.9 % will succeed with it to some degree if they choose to).
Vape for a while, hang for a while, read up and research. Use any savings to upgrade later.
Maybe check out "spinner" or "twist" kits. You'll need more cartomizers than you think.