I don’t use Plasma, but in Mint Xfce, you click:

• the whisker menu (aka Start),
• System Information,
• Copy,

which includes all this and USB and Repos sections.

If your mouse/touchpad is broken, then doing it with a keyboard only may be a bit tricky for a newbie, because you have the Shift+Tab to get to the Copy button:

• Super (aka the Windows key),
• arrow down to System Information,
• Enter,
• Shift+Tab 4 times,
• Enter.

While CLI is superior in many ways, sometimes even for newbies, I’ve found that for them GUIs are usually much easier and safer. I recently struggled to get someone to type spaces in the correct places in a terminal, over the phone.

Trolls, who like to corrupt people’s data, exist. A GUI procedure is almost always safer.

The Xfce file manager, Thunar (4.18 with en-US as language), also has “Create Folder…” under the File menu, and in some contexts in the right-click menu.

Under Preferences, Behavior, it has both “directory” and “folders”.

man ls uses “directory” only tho, and of course mkdir.