The first one is always tricky, putting it back on also.
Behind the door handle is a trim bezel that is just velco.
Remove and remove phillips screw behind it.
Door lock button has a trap door that lifts out then the button pulls off.
Behind that is a torx srew that holds the lock trim to the door, remove.
Next are the push type clips that hold the edges of the panel to the door.
These must be pryed away from the door all the way around the panel.
Now for the fun part
After pulling the bottom of the panel away from the door stand up and firmly grab the door armrest/handle.
In a jerking motion, pull up and out on the door panel. there will be a large electrical connection to release behind the panel.
Install is the reverse of removal, but still tricky.
Hope this helps.