PLEASE, if your not sure of your ability to tackle a brake job, don't. Brakes are a safety issue and should only be serviced by trained persons.
Forgive the soap box, but I work in the trade and have seen the scariest crap brought in by someone trying to save a buck. The person you kill by having poor brakes will likely be someone else.
Do your own tune up or oil change, if it gets messed up, no one gets hurt.