Difficuty?Has anybody done this? Difficulty? Complications?
How big are your hands? How tight are the nuts? How long is a piece of string?
It's as straight forward as it looks - get in there with a wrench, remove the nuts that secure the fan clutch to the water pump pulley, pull the fan & clutch forward and remove.
It might be easier if you removed the fan shroud and/or the radiator, I've done it without removing the radiator, can't remember if the shroud HAS to be removed.
Hey, sh!t happens, the nuts get rounded off, the fan might break, the shroud might break, you might stab the wrench through the radiator and it springs a leak.
We don't know your skill level, we don't what your tool set looks like, it's not difficult in the sense that it's not a complex task, something a first year apprentice can be trusted to do.