Play FF7 first. As I recalll, the PS2 shooter was actually a prequel but obviously you'll need FF7 to give you the background about Vincent. Crisis Core takes place before the movie as well, I think, but it's also separate from the storylines of FF7 and the movie.
The movie takes place last, chronologically.
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.