Making progress, exploring the links in my spreadsheet, I FOUND the one for TAGS EXPLORER. When I click on the link,

I reach this msg


The data you are requesting isn’t available.
(TAGS Owners: Check spreadsheet is
File > Published to the web)

The scripts with instructions were only slightly cryptic, well documented actually, considering it worked this far, but I seem to have fallen short of the grail. I’ll go back and revisit ….

aha, found and now putting in spreadsheet URL, clicked 2. Get sheet names .. it’s swimming …

back again, got it, put in the key (I generated)

and now i have sheet names, which sheet?
I’ll experiment