remove the front guards, this will expose the door hinge bolts. From there, you have to use a small hammer to tap out the small pin from the "thing that holds your door open" (youll understand when you look at it)
once you have tapped the pin out (dont lose it either) you can pull off your kick panel trim down by your pedals, and unplug the doors, usually there is 2 plugs but sometimes 3. unplug them and then pull the door loom back out through the hole in the lower A pillar.
once you have freed the wiring and removed the "thing that holds your door open" so long as you have access to your door hinge bolts, you can start to undo them...
I suggest you get two tires (not on rims) and lay them next to the car under where you will initially place the door. so you do not damage the door when it comes off (as they are quite heavy)
Undo the four 14 mm bolts (2 in each hinge) and have a friend help you place the door onto the tyres you have laid down...
bolt the 4 bolts back into the A pillar so you dont lose them...