Here are the instructions for changing your website's font:
1. In your site editor, go to the Design Tab.
2. On the menu to the left, select a font from the dropdown menu in Font.
The font applies to all of the text on your site. These are font families, which means that the headings will be in the font listed so they stand out, while the rest of the text is set to a font the compliments the heading font, but doesn't steal focus.