In my experience, jet lag takes two or three days to be fully over, but you need to make an effort to adjust to your new time zone. Sleep when it is night, and get up in the morning. The first few nights you may have difficulty sleeping, but you will adjust.
You could always try melatonin to help you get to sleep at night. If you have a prescription sleep aid, use that. These methods should help you adjust as quickly as possible.
I've had jet-lag last as long as a week or so. It will go away though, just give it some time. It's also possibly that you have contracted a disease wherever you were travelling so that could make you additionally tired, but this should also go away if you give it time (depending on what it is).
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.