how serious are you about it? i quit smoking after about 14 years of a pack / 2 days using ecigs about 2-3 months ago and haven't gone back...in that time i've learned TONS
basically you have a few types of ecigs some better than others for different people
you have the prefilled cartridge ones that look like real cigarettes, those to me seem like a gimmick and ive never heard any good things about those when it comes to people really going into quitting
then the next one up from that is the two part system with a battery and then something that screws on to it that you fill with the juice (can be a tank/clearomizer) which has a wick system that sucks up the liquid and then vaporizes it
then theres all sorts of ranges of those ones
if youre really wanting to get into it then buy this:
http://www.canvape.com/lavatube-lava.../lavatubes.htm
and then this:
http://www.canvape.com/product-p/f16.htm and with it get a few refills of the cartos which are the piece that goes in the middle and soaks up the juice from the outside and allows you to vaporize it
juice you can get from different websites that has a concentration of nicotine in it i vape 18 concentration but i wouldnt go higher than that unless you know what you want