I also prefer to let the insurance handle it. if you are going to do it, yourself
remove the inside panels and remove all the wire connections.
Does your door come with the wiper motor and wiper installed? How about brake lights and spoiler? Glass?
Is the "door open" sensor at the door jamb still working or is it damaged?
Apart from that, the sheet metal might have been distorted so that the new door will not align correctly, but you would know this only after your install the new door.
Please take lots of pictures and document all your installation steps. It will be useful in case you decide to involve the insurance down the road.