Mini starter PLZZUZUZUZUZUZUZZZZZZZZZZZZZZZZZZ

Is it spinning and not catching or not turning at all?
If its spinning then the bendix is out and not letting it engage the converter gears.
If its not spinning then its wore out or check the relay on the fender(cross the bolts with a screwdriver).Or maybe the key switch.
My knowledge of starters is also several years old as I haven't had to replace one in awhile so I could be a little mixed up on this.