The first step is IMPORT the font in the site, You must use THIRD-PARTY option to make this.
We will use this font on this example https://fonts.google.com/specimen/Indie+Flower
Note: You can get the import code in the font page, please check this example
Now, you must apply the new font to the desired text
How can I get the code to apply the font? Please check the next image
Have a nice ordering
Regards, Marcos Beltran