Although Drupal has reputation for being a developers' platform, lots of user rely on Drupal's admin area for key tasks.
For typography in Drupal sites, the best way to change your site's fonts via the admin is a module called @font-your-face
The @font-your-face module allows you to work with webfonts like Google Fonts or Font Squirrel. It also provides the ability to work with paid font services like Typekit or fonts.com.
In this tutorial, you’ll learn how to configure and use this module in Drupal 8.