Adding Fonts into WordPress with the Pinnacle Theme

I downloaded the theme Pinnacle by Kadence Themes. I want to add custom fonts into WordPress so I can add them into the theme, using the tools provided by Pinnacle such as (ex. by going to Appearance, Theme Options, Typography). I’ve been researching, trying to find a way to add fonts into WordPress. I found videos on adding them from google fonts and squirrel fonts, however I have a specific font I want to use called Stencil, which is an otf. I found a couple videos talking about using a plugin called Use Any Font, however it requires one to buy the API code, which is $10 in order to be able to use the plugin. Is there a way around this? How can I install custom fonts that will work with the Pinnacle Theme? How do I install custom fonts into WordPress for free? Please help me, thank you.