So a few days ago, I started rom hacking and learned a lot about it but there are still things I don’t know or never experianced and I feel like I could learn from other roms with some kind of issue so that when my rom inevitably ends up glitched I’ll be at least a little bit more ready.
I’d recommend hanging out on the discord and seeing what types of issues crop out and how to solve them so you’re better prepared.
I don’t think anyone has a test rom with issues to help troubleshoot common issues as you’re suggesting. My advice would be to learn as you go since the solution may need to be tailored to what you’re aiming to build anyway.
Good luck and welcome!