I haven't personally done it, but according to my friend that does his own auto repair, it's fairly easy. Make sure you have your car manual and follow it to the t...and if it's your first time, you'll probably need an extra set of hands or two.
when i was younger i used to help my dad with 'tinkering' our car... and i knew then how hard it is... if i were you, i'd let the professionals handle it..
No help from me I'm afraid, if you have never done it though I would suggest you use a mechanic or local garage, it has to be the safest option, I mean brakes......come on