Openings lead to midgames and lead your plan to the midgame. I know it’s not much as a beginner but it will help them understand the midgame what is it what to do there and if you say again that it is not needed for beginners to practice these small stuff but it helps them get used to it.
Chess Openings Resources for Beginners and Beyond
https://www.chess.com/blog/RussBell/openings-resources-for-beginners-and-beyond