My wife and I are choir directors and this past summer we led a "Crash Course in Chant" for our congregation to aid in their chant literacy. It's our first time doing something like this so it's far from perfect, but the response from the participants was very favorable. Hopefully it can be of use to people on this forum, especially the Resource list at the end. Further details and the link to the PDF are in the following blog post:

https://www.destinlatinmass.com/post/for-the-love-of-chant

God bless,
Kelvin Sandigo