I don't have any experience with the Raspberry Pi, but you could try prefixing it with python to indicate you want to execute the file with Python (your error means it is trying to execute the dev_appserver. Py command, which it doesn't recognize).
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.