Regarding this lecture I found the course
“Unlocking the Unreal Engine Material Editor” by Timothy Trankle
Very very helpful so far, I got it free from his youtube give giveaway if its still sharing the video in case its still hopefully valid, either way I found this course to be the best companion course to unleash the beuty of unreal material editor not only that but you will have better understanding of any 3d engine node editor, Unity, Blender3d, …etc