In this video Lara Schenck and I pair up, and she teaches me all about child themes in WordPress. It's like a podcast that you watch too!
We straight up create one, starting from the Twentysixteen theme, which provided a pretty nice basis for a child theme (not all themes are created equal in that way). We discuss things like how to import the existing stylesheet and do your overrides. We look at the functions.php file and how we can use that to do unique things to our new theme.
I was impressed by the fact that we easily created some custom data fields and applied them into the HTML of the template without forcibly overriding any theme file.