It may take them a little while to find your blog. They have many sites to do. It takes sometimes up to 3-6months.It took one of my sites a long time too.
The more traffic your blog gets, the better chances of Alexa ranking it also.
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.