I just bought Font Awesome pro and I have no clue how to use it.

I downloaded the plugin, now how do I use it? Im trying to add icons to circles in the attachment.

In the second attachment is where im supposed to add the icon codes but it doesn't work. Could I please get some help on how to use the icons and add them to my site? Im trying to add them to my (mod_tz_services) module on my website in the Icon section