How curious.
I am now trying my first backup. There were extra steps and I think I did it correctly, but the web site inundated me with details in a way that Shirt Pocket did not do with SuperDuper.
I haven't used Mac OS regularly since about 2018, so I take you at your word that backing up isn't as easy on Mac OS as it used to be.
With any luck, this just works. There is room for a simpler and gentler introduction to this. Maybe I can publish one.