You are a newbie, so I'll try to explain how the sample project works. First of all, you talk about Activity, but you need to use Fragment. The activity is just the host for one or more fragments.
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.