In theory its 3 hours, but the broadcast schedule (from OBS - the Olympic Broadcast Service) has the ceremony starting at 02:00 GMT/UTC until 04:40, with 'Ceremony to Light the Outdoor Cauldron" from 04:45-05:50 (it maybe the main events finish by 05:00. ).
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.