As a beginner, at first it may appear overwhelming but rather than go through so many steps to achieve the ultimate vape, I would highly recommend going this route. My reasoning is straightforward. The advantages of using a variable voltage device (and excellent ones such as the Buzz or IPro) is that the learning curve will be no more than going with cartridges/atomizers, then cartomizers, then tanks. You can use all of those systems (recommend 510 threading) with these VV mods. The real beauty is that you will get optimum flavor and vape from each of your juices with excellent battery life. If you were to use say for instance, Boge 2.0 cartomizers, these mods will work at lower settings providing you with a sweet spot.
The Boge 2.0 cartomizers with an eGo battery provide an excellent vape as the cartomizer is what is called a LR (Low Reisistance). The VV mods though will allow you to bring the voltage higher a bit to maximize the flavor and vapor output. Not only that, you will have "consistency" in your vape time after time, unlike the eGo or similar batteries that diminish power as they reduce in battery strength.
Using a Boge 3.0 will really shine as those cartomizers can handle higher voltage and make those flavor "pop". Some like the dual's as well but to begin with you can stay with a 3.0 then experiment as time goes.
I can always tell when my eGo batteries are losing power as I have to draw harder for the same amount of vapor, and the flavor is not nearly as rich.
You cannot go wrong with either of these devices and is my opinion, one of the best on the market, simple to use, excellent build quality and something that will last you for years and years.
Here is a video on the ins and outs of the Infinity Pro (which personally I have coming in the next few days)
A PBusardo Review - Infinity Pro VV Mod from NotCigs - YouTube
The learning curve using this mod will not take any more time than starting with substandard systems and you don't need a math degree for that matter.
Just my 2 cents.