Its not a bad idea to start out with a dripping atomizer, also called an RDA, first.
Ive got a couple, one that Ive really taken too, is the A7. Its small, so you'll get used to working in tight spaces, but its easy enough to build it, and Ive seen people making dual coils on it too. Its got an adjustable center pin, its bottom feeder capable, it comes pre-coiled, there is no side-air hole toline up with the coil, the top screws on, it never leaks unless you get crazy with overdripping... Its a perfect starter RDA and its very versatile. Its sitting on my Provari in front of me right now.
Also, the Igo attys are nice too. Igo-W for dual coils(single coils OK too), Igo-L for singles, Igo-S for a mini size, Igo-F for a dripper/tank convertable model. the Igo-W or L would be my suggestions, the W being the more versatile if you wanna try dual coils.
But they're not a genesis atty. And I get that. So..
Wanna try a genny without forking out the cash for a beautiful Zen?
AGA T2, T or T+ are all good, cheap Gennys, very popular and they look sharp
Smoktech RSST is a very noob friendly Genny, which happens to preform like a boss.
Any of those will get you into a genny, including buying a bunch of mesh and wire, without spending close to the 140 that the Zens cost.
Now, Im not knocking the Zen products, I for one think the Zenisis gear is sex on a platter.. but if you're unsure if its for you, its a chunk of cash that you dont NEED to invest to find out.