IGO-W is a good starter dripper, you can use single or dual coils if you get teh 2 hole cap and the build is pretty beginner friendly, the W2 and W3 can be a royal pain inthe nether regeons. The Tridents and Omegas are pretty popular also. Look for drippers where you can get at the terminals trying to install coils at the bottom of a hole will make you curse... a lot....
I really like Youdes offerings and am using one of their AGR+ carto units on an 18650 pumped nemesis while writing this.... Across the room is an 0.8Ω IGO-w drilled out, single coil, awaiting a free mod, and a dual micro coiled, hemp wicked, 1.4Ω IGO-w3 on a VV mod regulated to 4v......
I like my drippers and gennys and when I get it will like my Aqua, but for all around stuff that I used to use EVODs and Protanks for the AGR+ is my choice these days, great flavor and almost as much producton as my W3, I dont have to carry juice tothe store with me and I dont have to worry about it leaking in my pocket or all over the coffee table......
Kayfun v3.1 and RSSTs are popular as starter rigs for tank units.
HCigar makes good stuff, some of the better clones out there as does EH Pro.
Batteries, high C rating Sopny then efest purple.
Regular C: AW, Efest and Panasonic
18350 AW and Efest
Chargers: XTAR VP-1, Nitecore i2 and i4 and LUC, but the early LUCs tended to charge slightly high which worries some people....
I polled around a bit for the ones with good ratings and got this:
Nemesis
Origin
Caravela
69
Chi you
One thing about the Nemesis is you pretty much have to upgrade the switch to magnets, just how it is...
Whatever you get, make sure to get a fuse for it, I like my eyebrows and assume you do also.....
Get a couple of 18350 size batterys also, sometimes the 18650s just plain pump out too much heat for the atomizer you are using and a kicked 18350 can last longer than an 18650 if you are using Ω+ resistances.
A kick will also make your 650s last much longer, but you have to use resistances it works with. However you can crank the voltage up and get your vapor delivery that way....