How do I add Font Awesome icon

Hi,

I’m using the starting site demo design for my homepage and struggling to add/edit the font awesome icon for the our focus section. When I tried to add a font awesome block, it just shows me a penguin-like icon that is not clickable. Also I checked the floating menu and there’s no way for me to add/edit.

I can send you a screenshot just not sure how to in this forum since this is my first time.

Can you please help? Thanks!