To add icons to your menus that look better, simply go to
Appearance > Menus or Appearance > Customize > Menus.
On the right side, every time you add a menu, you will see a box with the name
CSS Classes (optional), here you will have to place the name of the icon you want to place, and Font Awesome icons are used (
See Icons). In the link you will be able to see and choose the ones you need.
Now you just have to copy your icon with the initials
fa-, example
fa-film, and paste into the
Css Classes, Now just save and see the changes.