To get started click on Menu >> Website
Click on Website Theme and choose whether you want to start editing the mobile or desktop version. Click on Edit
Click on Use Cover Designer
On the bottom bar click on Text. Here, you will be presented with the text the way it currently reads on your website
Click on the text that you want to edit and then click on Change Font
Select your favourite one and then tap on your cover image to remove the font options bar at the bottom
Then click on Save in the top right corner