First you need to scrub! Don #3 gloves. take digital picture of engine
before you start, so you can locate where parts go back into engine.

locate special plug wrench on instrument table.

This is a one piece extra long spark plug wrench.
A regular socket might get stuck in the plug area.

After you remove the air cleaner intake,(4 bolts) and carefully put them
FAR away from you engine, so they don't get lost or fall into the intake.

this runs across the top of engine. it comes off

With a boot puller, remove the wire boot and wire. do not pull wires.

Remove the plugs with wrench and extracate from vicinity. inspect removed
plugs.

Gap new plus

Do NOT use platinum plugs in a  KIA, they get too hot.
change the wires while you have it open,

reverse procedure. Extract cold cylinder of malt beverage from cooling
location. Extracate liquid to internal oriface. Expell and vent excess
gasses such as Carbon Dioxide, etc. Have assistant close.
Find car dealers HMO and bill same.