Easy peasy. Jack up car, take off wheel, put on axle stand, remove split pins, push pads back in with screwdriver, remove old pads, fit new pads, replace split pins and wheel. Takes about 5 mins a side.
Preferably use a syringe to take out a bit of brake fluid from the reservoir before you start or it could overflow and damage your paintwork. Or even better, bleed the brakes before removing the pads, that will change the fluid in the calliper.