Best of luck with it, Marb.
I’ve given up smoking a number of times. On previous attempts I lasted six weeks, six months, two years, ten years. This time round I’ve been off them 20 years. The first few days are the hardest, but after a few weeks the nicotine is out of your system and the physical source of addiction has gone.
Each attempt I made was purely on impulse, and I went cold turkey. I couldn’t have told you even that morning that it was going to be the day that I would stop.
My brother’s approach was totally different. Each year he reduced his smoking by one per day until fifteen years later he reached zero.
I would have found that approach totally impossible. Different strokes, etc, so go with whatever works for you.