The tutorial is from 2021, i am not sure if it works for newer zorin version. You would better be off trying the Pop! OS repo
Open terminal
sudo apt-add-repository -y ppa:system76-dev/stable
sudo apt-get update
sudo apt-get install system76-driver-nvidia
(optional the pop os kernel)
sudo apt-get update && sudo apt install linux-image-generic linux-headers-generic
After it's installed you might want to delete their repo
sudo apt-add-repository --remove ppa:system76-dev/stable
@Aravisian, can you hide or remove that older topic ?