To change the type of footer you will need to open the Customizer (Appearance -> Customize) and click the “Footer Settings” section.
Here you can add 3 columns for widgets, and some additional information on the right hand – in a fourth column. From the Widgets Boxes template, in the FOOTER section, you can customize only the social icons to insert in the footer. For adding widgets and start customizing those columns, you have to go to the WIDGETS section in the customizer.
Click on Select Colour and pick the colour of your choice for the top line
The result is: