Regardless of age, a kid shouldn't be censored from anything. The only thing that happens is that they're lied to and shielded from the world. I've been playing M rated games since I was 5 (mortal kombat).
There is some violence in it, like World of Warcraft style maybe. There is blood. There is sexual content too.
You have to understand what you're doing I guess to enjoy it. I don't think it's appropriate personally. It's a great game, but I'd limit it to high school age.
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.