I hope this comes off as more of a buyer beware post than anything else. While 510's are perfectly fine devices, there are a few things that really put me off about them. First of all, eventhoough automatic batts seem like a good idea, they are terrible for a newbie! I've seen too many newbies upset because their brand new auto is malfunctioning and they don't know why. Auto batts are NOT sealed and it is too easy for a newbie to overload a carto/cartridge and get juice into the battery without realizing it. That almost always spells death for your battery! At least get sealed manual batts to prevent this from happening in the first place.
Secondly, while said sealed 510 manual batts are better, even the largest 510 batts will have you rotating batts (provided you had the forethought to buy at least 2 batts in the first place) 3-4 times a day. That doesn't sound like much right now, but once you've vaped for awhile, it quickly becomes a pain in the .... Even the large 510 batts can't handle dual coils without possibly killing the battery. For this reason I suggest getting at least a couple of eGo 650mah type of batts to start off with because they can handle most anything you can throw at them provided it's not the wrong thread. Ideally though, I would go with 2 eGo-C Twists 1000mah's because you can get almost a full day's charge on one battery and you always have the option to adjust the voltage from the battery if the need ever arises.
Lastly, if you are commited to using the 510 system, you can;t go wrong with single or dual coil cartomizers. With those it's just about a good first fill and you're off vaping without much hassle. The key words are "good first fill" and if you fail to accomplish this first task you will kill the atty fast! I generally use a syringe to make sure I have no dry spots in my cartos, but some people have syringe phobia's and perfer the condom method. I've tried both, but the condom method is too slow for me.
Of course there are many other devices and setups that you can have access to, but as a newbie I have tried to give you the best info I can think of. If you need any more info you can PM me or ask any of the more seasoned vets on the forum. Good luck and keep the analogs on your six!