There is a special door panel removal tool that will help prevent breaking the fiberboard backing, but I have never used it. Just remove the door handle trim screw, screws in the speaker grill and 2 in the armrest, the 2 bollts in the arm rest and the mirror trim panel screw. Pry the panel from the door carefull so you do not pull the plastic fasteners from the door panel. They are just slipped into place. Once the panel is loose, pull it away from the door handle and pull it straight up. Invariably a few will stay in the door, just pull them out with pliers and reinstall in the door panel.
Installation is a bit tricky, since you have to get the lock knob in the hole and the top trim seated in the opening by the window. Unscrew the lock knob to make it longer and pull it up, then work with it onto the door. Lastly snap the fasteners into the holes on the doors and reinstall all of the screws. The arm rest screws & bolts can be a bit of a pain to get into the right holes also.
Good luck