Everyone is different, but I realized that my first step is that I had to WANT to quit. I'm on 2 years, 5 months, and 21 days (yes, I use an app called "Smoke Free" as I get geeked off data and it shows a lot of cool shyt about how your body heals, how much money you save, and how many cigarettes you haven't smoked).
I smoked for over 20 years, but I quit using Nicorette and phased off that after about a month or two. I'm essentially addicted to chewing gum now, but I'll take that over smoking.
shyt was the hardest thing I've done, I still miss smoking to this day, but I romanticized it. It's doable but I think the desire to quit has to come first.