I just recently quit, so I'll share my experience with you. I never forced it especially on really stressful days. One of the things I noticed in particular, I got 3mg juice, mainly cause I like to just sit and constantly puff on it, and I won't overdo it. The first two weeks, I still had cigarette cravings and I smoked, and used the vape to alternate. Eventually I smoked less and less. It was about 24 cigarettes down to 3, and then... I really stopped craving them almost entirely. The ecig totally cut down on my nicotine intake to the point where I didn't want them. I've also heard that vaping isn't as fast of a delivery system, and that it takes like 15 min for the nicotine to really hit. Someone correct me if I'm wrong on that.
As far as gear, I used a disposable at first that sparked my interest in totally switching to vape. Then I went straight out and bought the Valyrian 3 kit. They're pretty expensive, yes... But I wanted to get something I knew I would like, and would hold up on me. I had issues with dual mesh coils burning cause I chain vape, the single ones perform much better for my style. My mom was a smoker for many years, she has been using her vapes for like 10 years now. She prefers the mouth to lung box mod with a tank. I wouldn't recommend pod systems cause I think they can be wasteful, but it's all up to you and what you prefer, especially if you don't wanna mess with coils and tanks. They can be finicky at times. I do think the more expensive vapes are more well built. More settings, fine tuning and all that. It's nice.
Whichever you choose, whether you like sub ohm, or mouth to lung, pod systems or what not, I wish you the best!