I lowered my nic the same way I got off analogs, I just decided.
I started vaping and was still smoking a few analogs, one day I just said ENOUGH! and stopped buying them.
Then I decided to lower my nic one step every 4 months. I've been vaping a year and am down to 9mg and next month I'm gonna go to 6mg.
I am used to a certain amount of *discomfort* as I was in sports and athletic early in life, and just worked thru it. I have fibro now and I just push thru the day with that, too.
I guess I'm not used to "that perfect feeling" or at least, don't expect it, so I just accept a certain amount of challenges and keep proving to myself that "I can do this!"
For whatever reason though, none of that worked on quitting analogs, before I found vaping. It was the ONE THING I could not seem to get a lasso around, or corral. I quit several times, once for 5 years, and went back. Smoking had me in a terrible psychological grip!
It's weird, most things in life are a body / mind thing, you need both sides to cooperate in the endeavor.
I think it's all going well now. But I do not think that I am invincible, I know I"m not. I do try to self hynotize a bit when I have to though.