Reinstall the plug. Always start threading any bolts or screws by hand to prevent cross threading. Tighten with a wrench or socket. Be careful not to overtighten the plug. Locate the existing oil filter.
Oil filters are usually on the side of the engine.
Position the oil pan underneath the filter to catch any remaining oil. Use an adjustable oil filter wrench to unscrew the old oil filter. Use a rag to wipe the area where the filter mounts to the engine. Make sure the rubber seal of the old filter is not stuck to the engine. Use some new oil to lightly coat the rubber seal of the new filter.