I had to boot into a timeshift backup in order to get back in.
Yes I had problems with the live usb nvidia - it wouldn't boot, so had to use open source drivers option.
I don't think I have the patience to stick with this much longer tbh. I just want the drivers installed so I can play a few games, nothing special.
And for such a highly praised distro to have basic driver problems like this isn't great really.
In Ubuntu this was done in a few clicks.