You've already got some good answers and, as you can tell, a wide variety of recommendations.
I'll just add that the advice to get a few different strengths is good advice. If you find a flavor you like, order it in two or three different strengths. That way you can mix them together to change the strength when you find one that works for you.
I'm not saying go out and buy a load of liquid to start with, that would be a mistake until you know what strength, ratio and flavors you prefer.
Finally, I cut down my nic strength at night. I had terrible insomnia (well, worse than usual) and I found that cutting down from 18 to 12mg after dinner helped with that a little.
So, welcome to the forum and good luck on stopping smoking. You have found an excellent resource to help you along the way.