Aww, I'm sorry you're having such trouble with it! I'd suggest first making sure your game was updated because I did make that section (a little) easier during one of the 'patches' after initial release, but I also made a walkthrough that highlights the fish encounter that will hopefully help you out: https://underbliss.tumblr.com/post/189195570552/ebon-light-walkthrough
I am dumb and apparently I can't read either.
I stumbled upon the guide you gave me before I posted my question but I read it wrong and thought that I needed a certain level of madness to get though the giant fish loop. After reading your guide for the second time I realized what I was supposed to do. Thank you for your help! Ernol here I come!! :D