Sorry I can't add much. I'm only about 17 days into vaping, but It's been my experience that each person is different. Before I found Vaping, I always wondered why some people could quit smoking cold turkey, and I couldn't. I'm 42, and I smoked a PPD since I was 14. I actually started smoking when I was 11!
Every peroson is different. After countless attempts to quit, vaping finally did it for me. I finally figured out how to couple it with a goal, which was paying for a new car. That's what finally got my wife on board, too. It's actually 'her' car!
But anyway, don't beat yourself up if you smoke some at first. While I was able to put the cigs down on Feb 25th, which was the first day I started vaping, a co-worker of mine who also started vaping recently, still smokes a few cigs a day. That few is still A WHOLE HELL OF A LOT LESS than he used to smoke. Neither of us is right or worng, is my point. One thing about addictive behaviors, is that each person is different. Just keep trying to replace smoking situations with vaping instead. Sooner or later, you'll start to realize how good vapor tastes, and how much Cigs stink.
One thing you can try is to force yourself to go like 3 days without an analogue, and then purposefully smoke one. It'll taste so bad, and make you so sick to your stomach, that it'll be all you need to know about why you quit in the first place. That's kind of what happened to me. I know I kind of rambled on, but hope it helps. Just keep your head up, and remember, every cig less per day is a milestone. You'll get there!