Piggybacking onto this to mention my go-to online RegEx editor: RegExr. It lets you test the regex as you type, explains the particular symbols used, as well as has a sidebar where you can see different pattern types categorically. I’ve been using it for almost 2 years now, and haven’t had any reason to use much else (after I discovered this).
I don’t want anything out of this for myself, as I currently have enough on my plate as it is. I’m just commenting to boost engagement. I love that you’re doing this, though! Happy holidays, everyone! *<|:-)