Everybody's different. I started vaping about two months ago. I had no intention to completely quit. I had tried a disposable that a friend of mine had, and it was...well, not awful but not great -- but it was SOMETHING. So, off to the Internet I went, figuring that if a cheap disposable could be ok, maybe somebody out there had come up with something better.
I was not prepared for the blizzard of equipment and inscrutable terminology that I encountered, but I finally found Smokeless Image. They were simple, straight forward, and reasonably priced, so I took a chance on a starter kit (I no longer use anything that I got in that first order, but I'll never regret that purchase).
I smoked for the first week, along with vaping. My intent was to mitigate my smoking habit, not quit. I focused on cutting out seven packs of smokes, which is what the kit cost me. I found that I was smoking a little less every day, eventually breaking through at the end of the week -- a whole day with no smokes. I decided to try stringing it out to a second day, then a third. I'm now two months in, and I couldn't be happier.
I'm not going to lie, there was a bit of tension the first week I was off the smokes, but nothing like a full blown nic fit. I suspect that I was missing some of the other 'mystery' alkyloids that cigarette smoke contains, along with the rapid nic hit that cigarettes give you (they are more efficient at rushing nicotine into your system).
I also think that, for me, keeping track of the money that I've saved and spending it on ecig equipment really helped, particularly in the beginning. Also, I picked up some heavy duty 36mg/ml juice that I used when I went out to a pub/drank my morning coffee/insert your favorite smoking situation here. That helped me A LOT. My normal juice was 24 mg/ml. I am currently down to alternating between 18 and 12, with no plans to drop lower any time soon. Maybe in a few months I'll try a 6 or 8 mg/ml.
Anyway, sorry for the long ramble. I'll finish by saying that, at two months off the smokes (Camels, PAD, 20 years), I feel terrific and have no intention to go back. Tried a drag off one of my wife's cigarettes a few weeks ago (I got curious), and it was awful.
Good luck to you. Don't pressure yourself. Get some small, easy victories behind you and start rolling.