Yes, you can add Adsense to your Google Blogger site, and yes, you can earn revenue as well. In a nutshell, you just need to follow the instructions inside of Blogger's help page and you can setup your Adsense with your personal code. If you get lots of traffic, they can click on the ads that are on the sidebar of your Google blogging site and you will gain revenue per click, just like you do for any external sites that you have your Google Adsense setup to link up to.
Much like any other site, you don't have to setup keywords to link. The Adsense is intuitive and it determines the best ads to link up to from whatever your blog is all about. It's fun and easy to talk about things you like to talk about, so when you decide to write about Thanksgiving or peanut butter or any topic, Adsense will be able to help you with traffic and revenue.
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.