Removing the pads is very simple. No caliper removal is needed. What you want to do, however, is to push back the pistons a bit so that when you put the new pads in there is room for them. Doublecheck to make sure that you don't overflow the brakefluid reservoir when you do that.
After you have pushed the pistons back you need to punch out the retaining pins with a narrow punch tool and then simply R&R the pads.
After you put the pins in press on the brake pedal and check the feel to ensure that it's solid and not squishy,--and then finally check your fluid level one last time. Finally, do the standard pad burn in which everyone today should be familiar with by now.
Of course, each model may be a little different in the number of pins and so forth,--and the brake pad warning low wire needs to be reattached.
See photo at here: