Remove the trim surrounding the door release lever using a small screwdriver. Pull the rear section (the widest part) away from the door and slide it forwards. You will need a Torx 20 bit to undo the 2 screws under the door pull after you've removed the screw covers. Now open the door, grab hold of the door panel at the bottom and pull away. Lift the trim over the door lock button and unplug the speaker and door mirror control.
I will give you some answers to your questions above in a little while Lucas.