Haha yep! Your timezone is in that danger zone where it's not wrong enough to be immediately obvious.
If you make a Windows USB install and boot into it, you should be able to run some Microsoft tools to try and repair the installation. You can search further for it, might be worth looking into if you have anything you want to access on there.
Port forwarding is not a cover your ass privacy feature, it's a compatibility feature.
I just did a quick search and yes, Zorin OS is based on Ubuntu so it will be able to work with all the regular Ubuntu packages such as those provided by Proton VPN.