it's a C clip.
go to any auto parts store, and they have a removal tool, and new clips.
if you don't want to do that.
get 2 small flat head screwdrivers. turn the handle where it's facing up. and look down behind the arm of the handle to the center, and you will see 2 small notches, put the screwdrivers in the 2 small notches, and push down. clip should come lose, and the handle will fall out. don't lose the clip, you will need it to reinstall.
hope this makes sense.