Change fonts

Hello

I’m new with wordpress and i want to change the font of my site. In fact, the theme that i’m using ‘Jarida’ supports 50+ google fonts. how can i access them. I want to create my post in one type of font and then write a word at the end of the post in another font. can i do that? and if yes then how?
The link to my site is https://www.theglobetrotters.biz/

Thank you!