Using Fontawesome icons with Upfront

Hi, I am using Upfront and would like to use some icons but it seems there are only about 10 non-alphabet icons showing in my edit screen - are these the only icons available or do I need to enable more somehow?

If these are all there are, then what would be the best way for me to install Fontawesome icons? Normally I would link them in the head. Can I do that somehow using Upfront? It's my first time using a page builder theme instead of using a text editor so I'm strangely lost. lol