heres the quick jist of it
obviously jack car up and take wheels off.
looking at the back of the caliper you should see 2 bolts holding it on, you only need to take out one and should be able to pry it up or down depending on which one you took out.
usually i take out the bottom one, lift the caliper up, and then slide out the top part by pushing it forwards towards the engine (good to regrease the slides when putting back in)
push the piston back into the caliper to allow for thicker pads, place new pads on either side of rotor, and fit the caliper back on.
turn car on, slowly push brake pedal in half way a few times until it starts to get harder, top up brake fluid at reservior if you should have to.