Brakes and Disks can be really easy to do....But they can also be a right pain....
My BMW's I've found incredibly easy, and on my Murano/Navarra done them myself as well....But don't forget some cars can be a paid. The back ones on an Audi A4 Convertible I had was nearly impossible to get the retaining hex bold out at the back of the brake assembly...A right paid and a lot of dismantling, not to mention that after all those years the bolts were very tight....
And from a safety perspective you should really have some axle stands and chucks etc...A normal little wheel replacement jack is not safe if you are laying underneath it and have to apply a lot of force on it for parts to come off...
All in all, it may be best to go to an independent....With my Audi I ended up doing that, and the specialist was quite happy to put my brake parts on it, all four corners discs/pads he charged me £50.....That was actually well worth it....