How do you install fonts taken from the internet

That's actually very easy, go to Control Panel and double-click the Fonts icon, inside here on the toolbar click File / Install New Font, browse to the location on your PC where you downloaded the Fonts to and click Install.

Just a reminder: If you keep your Control Panel set on "Category View"
You need to click that arrow and change it to the
"Classic View" in order to see the individual folders,
Including "Fonts."

Here's a good web site for downloading all kinds of free fonts:

Search Free Fonts - largest collection of free fonts available for download