OK, in that case, I'm going to suggest you buy a sub ohm tank that comes with pre-built coil heads. Some devices and tanks to look into.
JoyeTech eGo One (already comes with a tank)
Aspire CF Sub Ohm Mod + either Aspire Atlantis V2 or Kanger Subtank Mini
If you're looking to produce a lot of vapor, I'd suggest you start with the .5Ω coil heads for whichever tank you decide to go with. If you decide you really like this style of
vaping, you'll probably want to graduate to a more powerful variable wattage/variable voltage mod along with some RDAs and such. But any of the devices I list above should give you a good (and safe) place to start.