Depends on your climate, whether you have outdoor space for growing it or need it to stay inside. There are thousands of varieties of trees and shrubs that will make good bonsai, I personally have about 75, of which about a dozen are indoor tropicals. The nost common for beginners are probably ficus for indoors, juniper for outdoors.
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.