If you’ve recently installed Linux, you’re probably going to be making a lot of changes and installing a lot of stuff over the next couple of weeks. I recommend using TimeShift (comes pre-installed on Linux Mint) to make a snapshot of your system. (It works like System Restore on Windows). The first snapshot takes up the most space but later snapshots only contain the changes you make to your system.
It’s a good idea to take a snapshot before you update things like graphics card drivers or additional desktops. Then, you can always go back to where you were if something gets messed up. You can even rescue a system that won’t boot by booting from your Live Linux USB and running Time shift. It will find your hard drive backups and restore them for you.