I think if you come from the future then you've probably got the gist of everything. But, OK....
There's a number of books, some awful movies, and other media based on Harry's 6* years at Hogwarts, with some extra details thrown in to include us other generations. I'm dead, some of the people I trusted most turned out to be utter shite, or they died as well, my son had the worst life I could have possibly hoped for him, but it's all OK because Voldemort is probably dead for real this time, and somewhere after that you came along!