Separately, I’ve never used a child theme before.
When you talk about making changes to the theme, am I supposed to copy over theme-related files that I update to the child folders?
For example, I made the change to the jkreativ-themes/template/blogpost/masonry.php you mentioned above and it worked perfectly.
Am I supposed to copy that file over to the child theme folder or anything like that?
It is not clear what steps I am supposed to take when editing code like this.