Copyright

Depending upon your theme, you may find in Dashboard > Appearance > Theme options that there is a field for “Footer Text”, you can add your copyright there.

Otherwise you will probably find it in the footer.pho function of your theme, if you change this then make sure you are using a child theme first.

BTW © gives you a © symbol

for theme specific suggestions, please post in your theme’s forum at https://ww.wp.xz.cn/support/theme/parabola/