Hurdling is a running, not a jumping event. It is a sprint event in which obstacles happen to be in the way.
If you are introducing long jump to complete beginners I suggest that you begin at the end.
A high jump introductory activity should be one that makes initial success likely and builds confidence.
When coaching, I often inherit kids who have been trying to throw the discus – sometimes for years – in a manner that is holding them back.
You are given the job of helping absolute beginners learn the shot put. Where would you start? What is the very first thing you would do?