So I grabbed my ventoy-drive, downloaded latest mint ISO on it and instead of doing something productive I planned to do I’ll spend couple of hours at reinstalling the whole system.
With Mint, you should be able to get to a working system that lets you do your paperwork within less than half an hour.
You can set up all your customizations again when you have more time. But it should also be no issue to just copy your old /home folder to the new system between Mint and Ubuntu. Then the only step after installation would be to install the programs you had before.