Hi,
It is something that can be done at home.
You will need the correct equipment -- decent jack, axle stands, spanners, sockets, G clamp, etc.
It is a straightforward job:-
Place chocks at the wheel(s) you aren't raising.
Jack one rear wheel up.
Put axle stands under the appropriate solid location (I use suspension swivel joints, others use under the back axle.
Remove the wheel
* -- see below
Undo the calliper bolts
Remove the brake wear sensor (if there is one on that side -- it is normally on the offside)
Remove the calliper
Suspend it from the spring (or similar) using a cable tie so there is no strain on the flexible brake line.
Push the brake piston back in by squeezing the pads back with a G clamp or similar.
Keep an eye on the brake fluid level under the bonnet as it will rise as the piston is pressed back.
Some people loosen the brake bleed nipple to let the excess fluid out at the calliper as that is the 'used' fluid. Be careful not to let air in.
Remove the old pads.
Fit the new pads.
Refit the calliper and bolt it on (use the new bolts if they were provided in the kit).
Refit the brake wear sensor (or fit a new one if it is worn).
Put the wheel on, remove the stands, lower the jack and you are done on that side.
Drink tea
Repeat for the other side.
Bring for a drive -- gently at first to make sure all is OK.
Drink tea -- or even something stronger to celebrake -- intended typo !
* When the wheel is off, check the condition of the brake disk and replace if worn or even anywhere near the minimum thickness.
Doing that will mean undoing the calliper mounting bracket -- those bolts are extremely tight -- you will need a breaker bar.
The parking brake must be released to get the disks off.