I also worked on a broken door handle. The old plastic cracked when a passenger opened the door with a little too much gusto.
I ordered a new door handle on Amazon for only $12. Amazon has everything.
Anyway, the old one come off by removing a screw and sliding the housing forward half an inch.
Then you remove a thick wire from a clip.
Install in reverse.
A pretty easy job if you don't leave your screw driver in direct sunlight for two hours in its little greenhouse case where it will heat up like white hot steel and burn your hand when you try to put a white hot bit into it.