The good things about e-cigs is you get the nicotine but not the tar ... next time I'm in the vaper shop I'm going to ask him if I can take a pic of his cube which shows what tar looks like!
Depending on your e-cig you can lower the nicotine, I'm on the second from lowest and then you can decrease to the vaper no nicotine to wean off the habit... like you I'm finding getting out the habit to go for a cigarette at the back door hard so I can imagine your hands are used to making them. You're doing good. You should log how many you are having though compared to your normal, beating your lowest day feels amazing! x