To be honest, I would just go back to use Mojave. I installed Catalina on my mac, and one thing you might not know is that a SHIT ton of programs are still 32-bit instead of 64-bit. Had to just downgrade so I could play my favourite games. Anyway, good guide. Didn't know this was a thing, so if Apple ever says "Fuck you" and forces you to update then I will use this.