Organizing eBooks &or Downgrading

I apologize in advance if this in the wrong section or if it has been addressed, but I am new, and cannot exactly find the answers I'm looking for.

First and foremost, I have a Kindle PaperWhite (9017 Serial Number) running firmware 5.6.1.0.2

1. I am pretty unsure if i can downgrade and jailbreak it. I tried downloading old "update" files and then using those (flushed the cache before ejecting device then hard reset and got error 12) TBH I'm not sure I even had the right files...

If it's possible to jailbreak it, I would greatly appreciate some pointers and maybe which files I should download etc. I'm a newbie but can follow along pretty well.

2. What is a good recommendation for editing metadata for my ebooks and organizing them on the device. I am currently trying to add books to collections but I have a lot of books and it's become very tedious.

TL;DR
1. jailbreak >=5.6.1.0.2
2. Best organization/metadata editor

Thanks in advance.