Changing pads is easy, unbolt calliper, remove brake reservoir cap, get g clamp and slowly push the piston back with old inner pad in place till it can't go any further. IMPORTANT: check that the calliper sliders are working and not seized, otherwise u will get premature wear on pads, insert new pads, both sides. Check handbrake shoes also when u have the calipers removed. Check and measure the discs also, if the pads have been left to wear metal to metal, then get them machined. When bolting caliper back on always use loctite or simular and do up f#ckin tight. I replace the brake fluid at this point, as over time it absorbs moisture, resulting in brake fade, this should be done every 2 years regardless of kms. Suck it out of reservoir, clean inside and top up with approved new fluid, NOTE: brake fluid has a shelve life and half empty containers should be disregarded after 3 months from opening. Then bleed system starting at the further most point from the master cylinder(LH rear) 3 pumps either side, then do fronts, check for leaks from all flexiable hoses as they dont last for ever.