“Blog Home” is My Home Page and It’s Nowhere to Be Found. All Pages, Posts are Deleted, Yet it’s Still There. Pages I Create Do Not Show Up in the Upper Right Corner as Links… Frustrated Beyond Belief and Don’t Know How to Get Out of This Conundrum.

Yeah, sorry about that. The developers of the new default theme, TwentyTwentyFour, evidently decided what WordPress really needs is ThemeForest-style “demo content,” only baked into an alpha-release quality theme-editing interface stapled into a beta-release quality block editor. That’s why you…

a) can’t find a homepage to edit — there isn’t one, and
b) have an advertisement for a fake architecture firm instead of a real homepage

If you really want to keep using that theme (or any other “block editor” theme) you’ll need to

a) Choose Page -> Add New Page to create an actual, real, WordPress page for your actual, real homepage. (Tip: ignore the intrusive demand to select “pattern blocks” advertising the same fake company.)
b) Figure out how to put content you actually want on on this new page
c) Figure out how to exit from the “distraction free” block editor back to your dashboard
d) Go to Settings -> Reading in the dashboard sidebar
e) Select your new actual page from the Homepage dropdown
f) Select “–Select–” in the Posts page dropdown

If you plan on actually blogging then you’ll need to

g) Create a second actual, real page, dress it out the way you want, using a loop or post block to show your actual blog posts, and also
h) Figure out how to use the theme editor to get the navigation to work as it’s also a giant, non-intuitive mess.

Or you can bypass all that $#% and choose a “classic” theme from the free WordPress theme directory and bypass most of those steps. (You’ll still need to set a homepage and possibly a blog page but at least if you choose a real, “classic” theme you won’t be ~~burned~~ buried in fake “demo” content from the theme developers.)