Welcome to the ECF... you have one thing right... you are here, and here you will get more help and more advice than you can imagine. Remember to take all advice with a grain of salt as we that are happy with what we are using have become huge fans of our own setups.. so we wax rhapsodic on what we are using.
My opinions
Auto batteries - not good, an auto battery is trying to simulate smoking, and a PV ( Personal Vaporizer ) or PENIS ( Personal Electronic Nicotine Inhalation System )

is not a cigarette, it doesnt work anything like a cigarette, and the more they try to make it look and feel like a cigarette, the less functional they become. ( my experience anyway )
Go for a Manual battery, that way you are deciding when heat is applied to the juice, and when it is not.
Looking like a cigarette, the more a PV has the look and size of a cigarette, the less functional it becomes, the battery has to be tiny hence runs out of charges very very quickly, etc etc etc
That said... there is a very good standard 510 model out there that looks somewhat like a cigarette that is quite functional and gives very good hits.
Some ( myself included ) will tell you to go larger... I vape an eGo and am quite pleased with it, some like the Tanks system, I dont... I prefer the type B cartridge and type B LR atomizers... but that is just me.
Anyway... welcome to the forums... you find out very very quickly that once you have a satisfying PV ( or PENIS ) that it looks acts and feels like a cigarette becomes meaningless because you will strongly prefer the vape to smoking.
I wouldnt touch a cigarette now if all my batteries and atomizers died this moment... I would wait the week for more to come in the mail.... to get to that point, you need to find an e-cig that works for you, and a juice you really like.