Thanks. I’ll give it a shot so.

@Charles Kenyon would you have a video by any chance of how to do this? I'm getting a bit bamboozled by these instructions.

Prephil, maybe you would find this video useful. When you go with this method, remember to start with the first instance that will be numbered and work front-to-back while adding these to an existing document. Once you have your numbering lists built, you can associate them with heading styles as well.

https://www.youtube.com/watch?v=He_ob8ydc9E