I am unable to configure Footer area of the theme, How could I do so?

The areas that you would like to configure is called Footer Widget areas that you can configure from Dashboard->Appearance->Widget.

All you need to do is just place your desired Widgets under the Footer Widget Areas (First, Second, Third, etc.) they will appear on the footer of your site.
If you want to hide the footer widget contents then, just place a Blank Text Widget under Footer Widget Areas.

You can also refer this tutorial link: https://www.inkthemes.com/how-to-use-widgets-in-wordpress/