That's pretty sad, dude.
It's also the complete and utter wrong way of handling the tutorial dungeon. Instead of barrelling in like you can in most ARPGs, try to peel them away from each other.
I advise you to get used to the quick rest and try again.
If you have to cheat your way through rats then you need much more practise.
Darkness-Crimson, after extracting, Data and Graphics will be in the Extract folder.
Extract/Data/Scripts/Editables
You're NOT looking for JSON files, you're looking for
.rb files.
To have the game recognise these files on load, pull both folders out of the Extract folder into the game's base directory and delete the rgss3a file.