Add fonts

Hi Sakin, I'm working in the website www.beformentera.com, and I’m interested in changing the font: my client bought the ‘Atrament’ font and wants to use it in his website. I’ve just downloaded the child theme for Catch Box Pro. I ‘ve created a new folder called ‘Fonts’ and I’ve uploaded all the webkits created with FontSquirrel. Which is the next step? Thanks in advance!!!