The footprint library wizard was retired in version 5. Read the articles i posted above. (And ignore any tutorial that either does not give the kicad version it is valid for or that is not written for your version.)
You have your terminoligy mixed up. EEschema uses symbols not footprints! A symbol is the abstraction of the function of a component while the footprint defines how it is “soldered” to the pcb (it defines the land pattern) See What is the difference between footprints and symbols?
Also possibly useful: