Hang a huge piece of fabric on your wall for color. Then you can stick pictures or whatever you want on the fabric to decorate it. Fabric is cheap at craft stores.
Go to a thrift store and find some cute pillows to decorate the bed find some colorful nick nacks to sit in your window buy a nice bright lamp with a colorful base for your table or desk find a light colored curtain to add a little more pop hang a purse hook on your door so you can admire all your pretty bags when the door is shut.
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.