I want to know the facts. Death, countries involved, ships used , guns .. Etc I love world war 2 but I want to know more then what they just teach in schools
To explain everything that went on would take a very long time, so instead can I suggest you delve in to these books:
Operation Fortitude - Joshua Levine http://www.amazon.co.uk/Operation-Fortitude-Greatest-Second-World/dp/0007395876 Fortitude was part of the intelligence war and set the scene to help D-Day happen.
The next three cover the invasion itself, as such will probably overlap to some extent, however, its always good to have a choice
D-Day: The battle for Normandy - Antony Beevor http://www.amazon.co.uk/D-Day-Battle-Normandy-Antony-Beevor/dp/0241968976/ref=sr_1_2?s=books&ie=UTF8&qid=1420030841&sr=1-2&keywords=d-day
The Longest Day: The D-Day story, 6th June 1944 - Cornelius Ryan http://www.amazon.co.uk/The-Longest-Day-June-1944/dp/145515654X
Overload: D-Day and the battle for Normandy 1944 - Max Hastings http://www.amazon.co.uk/Overlord-Battle-Normandy-Military-Classics/dp/0330513621/ref=sr_1_5?s=books&ie=UTF8&qid=1420030879&sr=1-5&keywords=max+hastings
Some of the above should certainly answer some of your questions.
ETA - If you haven't seen it its worth watching Band of Brothers (or at least the first few episodes), its very accessible and superbly made.