Really easy man, a simple socket set and either mole grips or a big adjustable are all you need.
Use a big adjustable to grip the aux belt tensioner, pull it back, and use your other hand to whip the belt off.
then it's just a case of removing the electrical plug, the fluid connection on the top, and I think 3x 13mm bolts that hold the pump to the engine.
refitting is the reverse of removal in true haynes style.
Should take 20-30 mins.
Once it's done, refill with new fluid but leave the cap off. Start the engine, and steer from lock to lock several times, checking the fluid level after each lock and not letting it drop below the plate with holes in inside the reservoir. it's a self bleeding system and after a few turns lock - lock it'll go quiet and you're done.