Take your time, don't push yourself. Having a drive and passion for a project is the most important thing for a creator, so if you feel like don't like the direction of where the story is going, don't force yourself to write it for our sake.
You should keep the original book up, but create separate one of you wish to revamp the entire story. In the end, your mental well being is the most important thing.
My opinion? I'm sad that the story in on a indefinite hiatus, however I completely understand the need to take breaks. So please dont push yourself and take a break. I'll literally enjoy any stories you write man. You're one of the inspiration to start writing and have the courage to post my stories. In matter fact, I've been reading your stories when I was new to wattpad years back, I only started publishing not too long ago after seeing the passionate community.
So please take care man! Take your time, it's alright!