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.