B...y hell you are ham fisted. Before doing any removals Get a wire coat hanger and tape about 6inches of the end form a hook and fish it up work it back through the seating gap. if it works all well and good.
But however you do it don't be so b....y heavy handed.
Other than that it's remove panel job as per marka356 There will also be push fit clips usually on the hinge end of the panel carefully prise the panel away from the door, use something wide bladed like a stiff wall paper scraper. Mirror bezel /trim has to come off any screw caps prise these off carefully they blend in but are still noticable if you look closely.
Try your local library they may hold some vehicle workshop manuals. If you phone them they will tell you. Join or take a digi camera and take pics of the pages you want. I did for a Vauxhall my mate couldn't get a manual local for his model they were out of stock [that was aimed at critics thinking he was tight] he is but that's beside the point.