I would recommend a simple 510 non rebuildable atty to start with. Then get yourself an Igo-l (you can build dual coils on it if you want, even though it only has two posts) or something similar.
For something simple and easy to get started, it's hard to beat a 510 regular dripping atomizer. Screw it in, drip 5 drops, put a drip tip, vape.
I usually get the long-barrel unsealed atty from Kidney puncher because I use mine in a bottom feeder, but if you are using it on an MVP, I'd recommend a sealed atty. This basically means that there are no holes in the bottom for liquid to leak out if you over drip.
Of course, if you prefer an RDA, IGO-L, W or F, are all decent RDAs to begin with.