Congrats John, you made a good decision! Here is my experience, for what it's worth....I quit analogs 2 days ago. I started vaping that afternoon, and had my last cig around 8 PM. I was super irritable for the rest of the evening, had a gard time sleeping, and generally wanted to punch my boyfriend every time he opened his mouth. Yesterday was better.

Today, I feel great....no cravings.
The thing that seemed to really get me was that my smoking "routine" was disrupted. My morning coffee with several analogs, study breaks to go outside and smoke, having a cig when I needed a break from the kid....weird, but I missed those excuses to check out of my life for a few minutes. For the most part, I am using the vape as a substitute, but on a more cerebral note, I'm being forced to inspect how involved I really am with my family. Huh.
Probably TMI, but thare you have it, and I wish you the BEST of luck!!