Hello! This page is devoted to doing the REAR disc brakes on a 2002-2005 Hyundai Sonata, but it’s the same general idea for any disc-brake setup.
Disc Brakes are pretty easy, as long as you have the right tools, and take your time!
First you'll need some PB Blaster or other penetrating oil. This breaks the rust/corrosion off and lets you crack the bolts free without breaking them off. You'll also need a silicone grease or anti seize for the caliper bolts, pins, and new pads. You'll need a caliper compression tool, or a sturdy C-clamp, and a can of brake parts cleaner.
Brake dust is extremely hazardous to your help, I recommend washing down the oil brake parts before dismantling anything, to keep the dust from getting in your lungs.