First impression of prufrock

Well when I was kinda reading the story I got a little lost because the tone of the story is changing at first it's becoming sad and then it changes to serious. What is the story mostly trying to tell us the readers is there like a message to the story. Also the peom at the being is Italian but if you translated to English then to me the peom means someone who is taking about his own death someone who thinks they may not be back home alive that they want to change their own life's and be able to reply their life's over and over again but that person knows they can try to change their own life's but the past will always stay with them no matte how much they try to erase it. That's what I think the peom means to me.