Adding a new widget area will require some familiarity with PHP, HTML, and CSS. Here are some resources for adding new widgetized areas to a theme:
https://codex.www.ads-software.com/Widgetizing_Themes
https://www.dummies.com/how-to/content/how-to-register-new-widget-areas-to-your-wordpress.html
You’ll first need to create a child theme, so your changes won’t be overwritten when you update the theme. If you’re new to child themes, you can explore these guides:
https://codex.www.ads-software.com/Child_Themes
https://www.smashingmagazine.com/2016/01/create-customize-wordpress-child-theme/
