I saved a copy of a working file and just abused the options until I got a feel for how it should work. Daunting to start with but quite flexible and effective once you appreciate how it works.
I would be careful of mixing up revision and issues, they are very different things in the change manager. An issue is typically a collection of layouts containing revisions although you could reissue the full drawing set. A revision is an incremental marker added to a single layout on which there has been at least one change. The change numbers are likely to be non-consecutive on a layout depending on what you noted as a change.
If you wish to consolidate your change notes you can just select a view or other object on the layout and note the changes under a single entry.
Apple iMac Intel i9 / macOS Sonoma / AC27UKI (most recent builds.. if they work)