i would say, stay away from the VV stuff.
For a newbie, these kind of options can be overwhelming. That and you would already have to explain atty resistance and their importance. variable voltage just adds to the confusion.
But that is your judgement call to see if they would be comfortable.
Introduce them to it, but if they give you the WTF look, just tell them its not a necessary but an option.
One stop shop is good, but also showing them that supplies can be had elsewhere (with examples), would help them learn to not rely on one source.
For an introduction I always stick with the, "charge, fill & vape" idea.
Not everyone wants a new hobby.
I show them basic kits from different suppliers, and throw them links to hardware and juice.
Let them do the research, then offer yourself as help before they make their first purchase.
let them do the foot work.
you dont want to turn into the "go to guy" every time they get a dry hit or pop a coil on a carto.
I've been there....
