I would suggest going for the middle of the range 14 to 18mg variety, and stick to it for two weeks or so. Weaning yourself onto vaping is somewhat uncomfortable and unsatisfying in the beginning anyway. Once you are used to it, it is easier to move onto higher nic content than lower nic content. I stepped into the high nic turd a while ago and am unable to get back to the lower concentrations. I worked in an environment for a few weeks where I could only get a vape in once or twice a day and decided to make it count by using very high concentrations of nic. Now I just don’t get anything from my 8mg and 18mg juices.
Don’t bother with getting it right the first time. I’ve been vaping (and cheating) for 2 and a half years, and I still haven’t found that perfect combo that always works for me. One week I can’t stand tobacco flavours and the next they are the only ones that works for me. When I’m driving the convenience of cartos can’t be beaten (haven't tried all the tank stuff yet), but when I’m at home I just love my LR attys with drip-tips. A few months from now you’ll look at your drawer/box full of vaping related stuff and feel the strong urge to order some more.