How customize font size on “Featured Content” theme options _ Zubin Pro

Hello, I just purchase the Zubin Pro theme, I would like to know how can i change and customize the font size (Tittle and Text) in the "Featured Content" theme options. Here is the web I am working in: https://omarlavalle.com Also want to know if its possible to add more than one "Featured Content " block or any other like (App section, Hero Content etc) on the main page of the web. Wait for your comments . Best.