Hello,
Thank you for the question.
At the moment our Theme Settings panel supports only Google fonts and there is no an option to upload your custom fonts, sorry.
The only way for you now is to make all changes manually and here are some tutorial that may help you
http://www.wpbeginner.com/wp-themes/how-to-add-custom-fonts-in-wordpress/
http://wpsites.net/web-design/fonts-wordpress/
Regards