Thanks for your reply. I’m using Longevity Pro. I didn’t use the parnet them at all, I immediately made and activated the child. The theme included a style.css and functions.php to use with a child, but that just had the basic header with the approiate areas filled in and the enqueue coding. So far I’ve just been working within the template, making choices via the dropdown menus/radio buttons to choose a built-in color scheme and page layouts. I’ve used widgets but as far as I know they’re part of the theme too(?). The only plugin I’ve used on it is the WordPress Database Rest when I messed up.
I haven’t inserted anything in the child style.css yet. Should I have? Or do I just do that if I import changes from elsewhere/make my own changes?