interested in setting up a "Table of Contents" for my site -- too much time spent with books?!!

and adults learn better when they're trying to solve specific Qs,
(i) so should I be looking into list containers or accordions, are they the same?
the user guide is mute on this ("coming soon")
(ii) how best to make this "attractive" on the web??

Accordions can be made from UL/li elements. I do believe Bootstrap has the built in classes to make your accordion simple to build.
here's an example that may help you get started.
https://www.tutorialrepublic.com/codela … =accordion

thanks, Eric, not quite the question(s) I was asking -- this is the simple form of "accordion" in things like mobirise -- not quite a real accordion -- as you'd find here -- called here a multi-level dropdown menu,
but some other places call these accordions
https://www.w3schools.com/bootstrap/tryit.asp?filename=trybs_ref_js_dropdown_multilevel_css&stacked=h
or a collapsible list group
https://www.w3schools.com/bootstrap/bootstrap_collapse.asp

I'm just not sure on the constraints or terminology applying in BB/FF/RSD
a collapsible list group with "fancy innards" -- brief title of "chapter sub-section" with brief description of what's in that section

but I guess, maybe, one could build the sort of component I have in mind, something like a cross between the two?