Trying to add another heading font option in Craft

[xenythsmommy]

My theme (craft) allows the choice of two fonts: heading and body. I would like to use a third font (a Shopify font: beefcakes) as a second heading option to apply to my menu titles and product titles/prices. So far, I have been able to change the font size and color using CSS but the font family does not change. So I have also added a new font-picker section under Typography for heading 2, but I am not sure how to apply that choice to the text I want. Any advice?