Free, no downloading online games like second life or sims?

You'll need to learn how to code, model, animate, write the story and create textures. There are some things like rpgmaker that simplify the process but don't give you very much freedom.

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.