In theory, there is no age restriction, but in reality you're not going to become PM without being an MP, and the requirement for that is being at least 18 years old. Being able to use google to answer simple questions is not an official requirement to be PM, but it's a good hint.
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.