Hi Sennerstad,
It maybe helpful to review the information on creating your child theme here: https://codex.wordpress.org/Child_Themes
Generally, only two files should be present in your child theme the style.css and the functions.php. The only thing in the functions.php of the child theme should be the loading of the child theme style sheet. Quote: Currently, “Unlike style.css, the functions.php of a child theme does not override its counterpart from the parent. Instead, it is loaded in addition to the parent’s functions.php.”