how do I use it with autojump?

Here is the autojump function for fzf/bash

https://github.com/junegunn/fzf/wiki/examples#autojump

You'll have to comment out the j() function in /usr/share/autojump/autojump.sh

autojump -s gets you the entries in the database.

You have to parse it to extract the directories without all the metadata it spits out.

Then you probably need to write a shell function in your preferred shell to tie the pieces together, as well as assign it to a keybinding. It's not too hard.

I use xonsh for my shell, so my config probably won't help. And doing it in xonsh is probably a lot messier than doing it in Bash.