I'm so sorry for your loss. You and you mother and brother are all grieving now. It's normal to go through these emotions.
Maybe you can talk to your school counselor or a therapist or maybe your pastor..It will take time, but you will come through this. Try to get some help . God bless you.
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.