Check this out:
https://kindlemodding.org/jailbreaki...m-a-reset.html
If you can’t get past the tree screen but can still access the Kindle storage via USB, you can try this:
https://www.mobileread.com/forums/sh...56&postcount=2
If you can’t see the storage when plugging it in, then your Kindle is likely bricked. See
this thread, and in particular
this post.