You can add widgets into the footer bar, which is the area that holds your copyright message.
This can be super useful for adding things like menus or social icons.
Adding a footer menu
First, you want to create a new menu in Appearance > Menus that will be dedicated to your footer. You can learn how to that here.
Then, go to Appearance > Widgets and drag the Custom Menu widget into the Footer Bar widget area.
Inside that widget, you can select your newly created menu.
Adding social icons
You can use a plugin like Lightweight Social Icons which adds a social icon widget to your site, or you can use a menu along with Font Awesome as explained in this article.
Footer Bar Alignment
By default, there’s 3 different position for the footer bar – left, center and right.
You can choose your alignment in Customize > Layout > Footer.