Here's my two jingly copper coins, coming from a guy who is by no means a Phil Busardo or a GrimmGreen:
PaporPlas has exactly the right idea, but one thing he didn't really emphasize sufficiently, and I would have in his shoes (and am mentioning now) is this:
Do your research first. Here's how I started vaping, and like with the OP, it didn't work. At all.
I started with a Red Dragon e-cig. I'm guessing it was a KR-808 system, maybe a 510. But the problem was, it came with one pre-filled carto. That was it. And that one pre-filled carto? Lasted for about 20 minutes of vaping. Thing was crap.
Skip ahead 2 years, during which I had naturally gone back to analogs that whole time.
My roommate insists I quit smoking. Insists. Is that obnoxious quasi-religious frothing-at-the-mouth insistent about it, and as I'm sure many of you can relate, that doesn't work with smokers. In fact, with a lot of us, and I was this way, it sets off an instant, "You couldn't make me with a gun to my head, you obnoxious, crusading punk!" resistance to quitting. You just cannot make somebody quit. He or she has to be ready, and you have to offer them something at least as good to replace the habit they've had for years.
Well, the roommate got a $15 e-cig from the corner gas station. That was a non-starter. For one thing, the juice tasted like an old lady's perfumed had been filtered through a rancid gym sock. For another, the battery had a life of about 5 minutes between 45 minute charge cycles.
So another 2 years goes by. I find snus. I like snus -- I'm speaking here of real snus, from Sweden, the not-sugary-candy-sweet kind that actually delivers on the nicotine. But snus doesn't satisfy the manual and oral habits. So snus cuts back on the analogs but doesn't entirely kill the habit.
Then the apartment complex I live at goes smoke-free. Crap. Oh, well, been trying to quit anyway, now's as good a time as any. Snus isn't quite doing it, though, so let's try e-cigs again.
This time I get a Blu starter kit. And it almost works. This time, I actually have a sense of the potential for this to get the job done. In fact... that Blu starter kit was the tipping point. As much as I've badmouthed Blu for their battery life, their shoddy quality-control on cartos (about 2 out of every 5 I ever bought was a straight dud, just DOA) and how expensive their carts are... they're the ones that the thing was almost solid, to the point where I said, "Well, what if I buy just the juice from somebody and refill these things?" instead of, "Nope, ....... this, I'll just break the rules and keep smoking anyway." So as much as I have bagged on Blu for their product's performance, and will probably do so again in the future... I have to thank them for pushing me over the tipping point.
The Blu was replaced by a Halo-cigs G6, which was replaced by a Joyetech eGo-C passthrough with Kanger T3 Clearo, alternated with a 510 atty for straight dripping, with that setup being replaced by an Innokin iTaste variable-voltage battery and HH.357 atty, alternated with Kanger M3 mini-clearomizers, which has recently been supplemented by another Halo G6 with mini-tanks for going out on the town.
But back to my main point: Through all of that, what has driven me to better and better gear and juices has been research. Hit YouTube. Look up the phrase "ecig review". Instantly, you will have a catalog of gear that is reviewed and demonstrated for you, right there on camera.
That's how I found Halo. It's how I decided to pull the trigger on the eGo. It's how I found the iTaste. There is no substitute for reviews when it comes to choosing new gear, and no excuse not to use that tool to make a decision that could save your life and even the lives of your friends. Since I started vaping, I've managed to get over a dozen of my friends to make the switch as well.
Not by preaching at 'em about it -- by letting them try it. Trust me, you can preach at a smoker 'til you're blue in the face and it'll just make them dig their heels in and never give up the coffin nails. But you give your pack a day pal a puff on Halo Prime 15 out of a powerful performer of an e-cig? He'll be asking you where you got that stuff. People will give up the habit -- they need a reason.
So do your homework -- get the best gear you can afford. Get the best juice you can afford. Do it for you and do it to save lives.