Relationships between parents and newly adult children can be difficult. Both sides are trying to find ways to respect the new dynamics and sometime the lines become blurred. I think that your dad may be trying to respect your new found independence and would likely be ok with you just expressing your feelings.
As far as mom is concerned again just talk to her tell here what you are feeling and go from there.
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.