You can absolutely do this! I started with an eGo kit at the beginning of the year, and still use my eGos, along with some new stuff. I smoked for 30+ years, two packs a day for many of those years, and I was able to make the switch without pain. Even my "ghost habit" is vanishing, as I no longer automatically look around for ashtray, pack and lighter, or walk around patting my pockets checking for a pack of cigarettes. I don't miss the habit at all, because vaping gives me everything that was comforting and soothing about smoking, without all the serious negatives (which I won't list, because we all know them so very well, and you said you would rather hear positives).
For me, the positives are:
- better health (of course!) because I'm breathing clearly, have more energy and zero congestion or wheezing;
- ♪♫*¨*.¸¸♥ ¸¸.*¨*♫♪ FLAVORS ♪♫*¨*.¸¸♥, because I'm crazy about the unlimited possibilities of vaping flavors, and that's where I go kind of nuts;
- the fact that this physically gives me the the same sort of ritual of holding and puffing, which for me was perhaps the most addictive thing of all. Even when I was able to quit for a while in the past, I always missed the process of smoking, and this gives me that comfort (but better, of course, since I don't get the nasty stuff).
- I'm not eating more, which was definitely not the case when I quit in the past. I'm actually eating less, because I don't really feel the need for sweet things as much as I did, since I have all my lovely sweet, fruit, and bakery juices.
- Finally, I've been pretty spendy with this, and it still isn't more than I spent on cigarettes, and now I'm in a space where I can start spending less after buying a lot of eliquids and flavor concentrates and bases for making my own liquids (fun!), and pretty much settling on a setup that feels great for me right now (iTaste VV v3 + Protank Minis, mostly).
As for inhaling mouth versus lungs, I usually just do mouth or mouth/nose but sometimes full inhale. I vape a lot, so I don't use very high nicotine (I began with 12 milligrams per milliliter, which is fairly low, and now mostly make my own at just 3 mg). It usually takes a bit of trying things out to find your right nicotine level, and then adjusting from there as you go along.
I just love vaping, and would never, never, never go back, and it all started with an ego kit and a couple bottles of e-liquid, and me just sort of thinking hmmmm, maybe?, pretty much as you are right now. Welcome to the wonderful new world; there are many kind guides here to help you explore!