Welcome, Mrephunk
I am assuming you are not new to vaping....do you use atties or cartos now? Using something you are already familiar with might be helpful. I also prefer the Cisco 306 atomizers from Avid Vaper. And if you are into cartos, I suggest the Boge 2.0Ω Cartos to start. Oh...and don't forget drip tips if you don't already have them. while they are not necessary, the do seem to make the experience more pleasurable.
I also suggest getting a digital multimeter...it really is helpful when trouble shooting. Seems like a hassle at first, but it really does a lot to help you. You don't have to spend a whole lot on one...no need to buy a Fluke or anything like that. Just a simple one...you can pick them up at most places for less than $10.
For the batteries...I'm using the 18350 AW IMRs...but I suggest getting 3 pair....not just two. You can get most things from RTD Vapor, but I know he's out of the 18350s at the moment. (I think we cleaned him out
)
Juice is too subjective...perhaps if you have us an idea of what you are into...tobacco flavors? Fruit? Desert? Do you know if you have a base preference like heavy PG or VG?
A lot of us are dabbling in DIY these days, but my favorite juice vendor is
Alien Visions E-Juice