After a lot of trial and error I finally found a system that works for me. I have a Nautilus Aspire tank. I buy 1.8 ohm coils in the five pack online; they're cheaper that way. I bought a VAMO 5 tank, also online and I bought 4 Efest 2100 18650 batteries in town. This setup (except the coils) has lasted me well over a year. I usually go though 5 coils within a month or two. I've tried other batteries; they don't work as well. Also you will need a charger. I bought one from a battery store; the one I bought from the vape shop here in town was expensive and was a piece of crap. I make my own vape for three reason; it's expensive at the local shops; I never run out; I control what goes into it. That said starting out you'll prolly want to buy. Based on what you said, I'd go for a 12mg e-liquid. You can always go up later. I agree with lots said here; esp. regarding ego510. Only problem is that you have to replace the whole thing when the battery runs out; but they are very dependable; like a swiss army knife; they don't break. G'luck and congrats.