People always compare themselves to others. In this case, you are comparing yourself to your sister. If people are telling you that your little sister is smarter, prettier, and more athletic than you, then they are just jerks who are looking to be horrible jerks.
If your sister is telling you that, ignore her because she is probably looking for trouble. If you are comparing yourself to others, that is normal. But bringing yourself down because of one person, that's not good.
I bet you that you are very beautiful, extremely smart, and you don't need to be popular to get through life. It is nice to have a lot of people that envy you, but the best moments come from when you have amazing friends. And if you are trying your best, then it doesn't matter if someone is succeeding more than you right now; because if you keep trying your best, you will come out on top.
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.