thanks for your description. Because I have the same problem (want to edit footer), I have tried to follow your instruction. But I cant find the right information to edit copyright stuff. Can you please give me some more information, whre I can edit it.
Once you install the icons plugin I linked to above, go to “Appearance > Widgets” and you’ll see it in the left area. Drag it into the Footer widget area on the right, and then add your social profiles.