Welcome Aboard!
That's a tough call. General concensus is that 10-12mg strength is about equal to the satisfaction you may get from a light cigarette. Anywhere from 18-24mg or even as high as 36 may satisfy the regular cigarette smokers needs. So much of it depends on each individual person.
I started out with 24mg and quickly reduced it to 18 and I've been fluctuating between 10 and 20mg even almost 3 months into
vaping. I'm sensitive to PG so a lot of the juices I liked were only available in PG, so I would purchase them at 24 or 36mg strength then cut them 50/50 with VG (50% juice / 50% glycerin) which not only cut the mg strength in half but cut the flavor too. Now however, I make my own juice for the most part and can increase the flavor as I wish.
A lot of people like myself find that we vape a lot more than we ever smoked. Well, that's a tough call too. When I smoked I would smoke a whole cigarette now and not have another one for a half hour or hour. But now that I've turned to the vaping side, I have learned just how convenient it is and can grab it anytime I want it or even think about it knowing that it's not harmful like cigs were so why not.
I would start with whatever strength your starter kit comes with and go from there. You can always either increase or reduce your nicotine levels as you learn. But I think you'll be pleasantly surprised at how well your new PV will satisfy your needs.
Good Luck.
