You can try this. Open your picture up in another program such as "Paint". Then you can do a "save as" making sure that you save it as a jpeg file which is one of the acceptable formats for pictures.
Your pictures are likely not in the correct format.
Usually you can not upload the said picture if its size exceeds the limit allowed by the website to which your are trying the upload, or if the picture's format is not acceptable, or if your disk space is not enough or a problem with your hosting company. Use Google Search to get some articles written by experts on the problem and I am sure you will get solutions.
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.