It all depends on your budget and what level quality you want to buy. I have tried green cig and safe cig but haven't tried green smoke or joye510 but from what I hear they are all popular brands. I have been smoking e cigs for close to 3 years and run a review of the best electronic cigarette (in my opinion.) The rest of your questions can be answered there.
As far as starter kits go go with the Safe Cig starter kits FOR SURE. Best.
You should be able to get a decent starter kit for under $70 from a reputable supplier. The best way to find a trader is to check with an independent online forum where enthusiasts can answer questions and give advice on technique as well as hardware. Prado are well known scammers.
The Joye510 is a popular starter device.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.