honestly mate, the door handle is p*ss easy.
get a medium sized flat head screwdriver, push it into the gap between the trim and the side of the door handle nearest the lock barrel. lever out the trim, and that will reviel the screw on the outside of the car.
the inside screw is located just above the door catch mechanism, and its usually a big old crosshead screw thats aligned with the door handle, cant go wrong here mate.
un-do both screws, the door handle towards the front of the car slightly, and then pull outwards and there you go.
fitting is the reversal of removal. its not at all daunting in any respect, nothing needs aligning at all, it just fits together. really dont worry about it.
i would advise however getting some door armour plates off ebay. stops people pushing a flat head down teh top of the handle and unlocking your door... scarily easy to break into a mk2.