Well, welcome to ECF! This is where you not only get help with e-cigs... YOU GET A SUPPORT GROUP!
A couple of things (some are redundant I guess):
1) there is a withdrawal from tobacco (alkaloids?) even while vaping. Lasted 2-3 weeks for me.
2) If you find that you absolutely cannot do without the alkaloids, research WTA here on ECF.
3) Hardware makes a difference too. So does nic level. The nic and the vaping action together help quell the cravings.
4) Don't kick yourself. Make sure to encourage yourself, and get the mechanics worked out.
I love the stories from people that smoke and vape for a while. They eventually get to a point where they forget to buy cigs, forget to smoke! lol. But it can take a while. There is no single 100% correct way... it varies by person.
I know I made dang sure that this whole "e-cig stuff" worked well before I finished off the last of the cigs. Some people freeze some cigs in the freezer for "security".
It took 5 volt box mods (APVs) for me to stay quit. The small 3.x volt stuff was not doing it for me. Maybe LR atties would have helped me more, but the point is that there is a learning curve and a bit of a "futz factor" with them. So give yourself enough time and chance to succeed. You'll get the experience you need. Discouragement and despair are your enemies now (along with withdrawal). Time, experience and patience are a good way to fight them!
Good Luck!