The most important classes you can take are creative writing classes. Any kind of writing class will certainly help, but those are the most important; reading other people's work, letting them read yours, getting feedback from your peers and teachers always helps in becoming a writer. You might want to take classes in different types of writing, more specialized courses.
Classes for playwriting, biography writing and the like will all be helpful. If you want to get into the more scientific aspects of science fiction, taking a few courses is technology could always be good, but this really isn't necessary. Some science fiction authors know a great deal about science, others don't.
The most important thing is that you have good stories to tell in a science fiction setting. The best way to get ideas in that regard is simply to read a lot of science fiction. Authors often go to specialists to consult about what they write, so you really don't have to load up on college courses for everything you want to learn.
If you decide to write a story where one of your characters is French, you don't have to take a French class. Most authors will have a friend who knows French help them to write French dialogue, or they will hand the story over to a French teacher at a university for input. A simple "thank you" in the dedication is usually all they require.
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.