fieros have discs and pads, not drums. the pads arent hard to swap, remove the wheel, remove the caliper, swap the pads. installation is reverse.
there are some details you must attend to. removing the caliper will require either a t-50 torx or hex bit on your rachet. use some wire to hang the calipers, never hang them by the brake hose. you may need to press the piston back into the caliper bore to get it back on with newer, thicker pads. a 6" c-clamp will work for this.
rear calipers are a little more demanding because of the parking brake. you must rotate them in. most parts stores sell or loan a special tool for this. the single most important tool fro working on your car is a shop manual.
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'84 2m4 se, a work in progress http://www.mtsu.edu/~mkr2c/fiero.htm
where's osama?