Your concern should be focused on how well you are doing academically rather than whether or not you are a "sophomore. " If you got straight "A" grades while taking four classes, then a six class schedule, difficult though it will be, might be acceptable. But if you were making "C" and "B" grades while taking only four classes, then six will be far too many.
The majority of college students do not finish their degrees in only four years, so there is no reason to worry about trying to "catch up. " Who will you impress? The other people who started a bit ahead of you really don't care whether you are a freshman, sophomore, junior, or whatever.
Your best course of action is to take courses in a way which gives you the best possible chance of doing well and achieving good grades. Focus on finishing the degree with a very respectable GPA. In ten years, nobody, including you, will care about how long it took or whether you finished "later than you anticipated.
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.