I almost never share an entire screen, but rather single application windows; when I absolutely must share visual information from multiple applications simultaneously, I create a separate virtual desktop for presenting. Is this not possible?
Printers are pretty plug’n’play these days, at least until something technical goes wrong. Getting exactly what you want on paper can be pretty tough, though. I wrote an entire printing stack from scratch for an embedded system, but that was for a very specific set of models from a single manufacturer. It actually worked every time, especially when there were errors and warnings, but it took actual effort.
As another commenter mentioned, it’s rather silly to use a USB stick to transfer files from one HDD partition to another. However, there’s absolutely no need to use a Live USB session, and their description of how to access files on block devices was … wrong.
There are programs you can find for Windows to access Linux filesystems, but those tend to be flaky; NTFS support for Linux is mature enough to accomplish what you need. You should be able to install NTFS support with apt and access the Windows partition like any other drive - I’ve done this. Googling “Linux Mint NTFS” should find you what you need.
It’s not in order to justify our existence, but to merely be able to exist. There are zero guarantees of having our basic needs met; we need money to even have a chance.