I totally understand the fear. I was forced to stop smoking back in March when I worked out that I was spending the equivalent of our mortgage (which we were then in arrears with) on tobacco every month (I had a 30 a day, 40 year old habit). I lasted until lunchtime, when I remembered that I had an old disposable e-cig squirreled away (had bought it when flying). Well, that horrible supermarket e-cig changed my life! It worked to stop the worst of the cravings and I spent the next day or so researching e-cigs, ending up ordering an eGo twist and Kanger tank set-up - which I still use every day, although I now have various other devices (it's become a bit of a hobby!).
I was scared because I didn't think I could face every day craving a cigarette - I had no confidence in my ability to function without one. The future just looked miserable. With my personal vapourising system (otherwise known as the 'thingy' in this house), I do more than cope with no cigs, I actually enjoy vaping far more than I ever did smoking. I'm into mixing my own juice flavours now, and am gradually working downwards in nicotine strength. I suggest you go for something like 24mg or 18mg to start with - you'll need that nicotine kick - but I bet you surprise yourself with how easy it is to make the transition. I'm aiming to be nic free by June next year (my birthday), but not planning on giving up vaping. There's more to it than just nicotine - the flavours are really nice, and I'm on a low carb diet, so enjoy being able to vape stuff like lemon meringue pie, apple pie, chocolate donut [sic] and cappuccino with NO carbs - lol :)
All the benefits of cold turkey quitting are there with swapping to e-cigs - you lose the cough, cleaner teeth, nicer breath, you don't smell, you don't have the guilt about second hand smoke - and you can even get kits to match your clothes - I have blingy ones for the evening, different colour lanyards for wearing like necklaces, all sorts of stuff! MUCH more fun than smoking ever was!
Nowadays, I see my nicotine habit as akin to other people's coffee (caffeine) habits - just as they enthuse about various types of coffee and coffee machines, so do I about different flavours and equipment. Nicotine and caffeine are roughly equivalent in terms of addiction and negative effects, and now the former can be enjoyed without harming others it has - in my mind at least - ceased to be a morally questionable thing to enjoy. Best of luck in your quit!