Having received emails advising that the website was exceeding its resource limit, I filed a ticket to seek help in remedying the situation.
Various things were suggested; so far, I have implemented the recommendations listed below.
Clean up themes
The following unused themes were deleted from the system: Astra, Book Publisher, Culinary, Digital Books, Dulcet, Fotografie Blog, Full Page, Hestia, Keenshot, Leftside, Minimalist Blogger, Minimalist Writer, Music, Music Lite, OceanWP, Publish, Publishers, Restaurant Zone, Totomo, Twenty Fifteen, Twenty Fourteen, Twenty Nineteen, Twenty Seventeen, Twenty Sixteen, Twenty Twenty, Twenty Twenty-one, Twenty Twenty-two, Verlex, Vilva, Writ, Yummy Recipes.
The following were then updated: Bloom Recipe, Unos.
Clean up plug-ins
The following unused plug-ins were deleted from the system: Akismet, bbp Style Pack, bbp Press, GD bbpress Tools, Image Upload for bbPress, KaTeX, weForms.
The following were then updated: Asgaros Forum, Coblocks, Contact Form 7, Front End PM, HootKit, TablePress, Testimonial Slider, Testimonial Slider Showcase, Updraft Plus, Word Press Importer, WP Recipe Maker, ZotPress.
The following was added, network activated, and auto-configured to improve performance: W3 Total Cache.
WordPress core
WordPress core (British English version) was updated to 6.3.
UpdraftPlus maintenance
Back-up frequency was checked to ensure it was running weekly.
All back-ups prior to the most recent six (6) were deleted to save space.
To be continued
More suggested configuration changes will be made soon.