I’ve just replaced the screen on my old one. I’d suggest to open the Kindle and assess the damage, if it’s just the screen you can buy a replacement online for $20 like I did. It’s really dead easy: unscrew, detach, replace - no soldering required, no special skill required beyond knowing how to use a screwdriver.
If the actual motherboard is ruined, that’s another matter; but the screen is a piece of cake.
