the manuals that come with the parts will be very informative once you get them. other than that i'd ask the store about which parts go togeather(mb and cpu) so you don't get the wrong socket. don't know a webpage, but i'm betting someone will ;p
I would either do it on your own computer if you have the money or take a class or a book. I would recommend a book cause manuals aren't too informative sometiems.