Marketing research for - where do creators who write, hang out?

Where do creators of all kinds hang out? Not strictly writers/authors, but anymore who creates but blogs/published words daily/often:

Product Hunt - launches
Twitter - #ship30for30, writing habit, #100wordsaday, followers of James Clear/#atomichabits, @david_perell @neil_strauss @IAmMarkManson
Indie Hackers groups - Deals, Goal Setters, Indie Publishing, Self-development,
Facebook groups - Atomic Habits Limitless Life, MentalChai, SaaS Growth Hacks
Google search - organic search keywords like writing, writing prompts, creative writing, “how to improve writing skills”, “how to start writing”, “how to start writing a book”
Instagram - writing communities
Reddit? - bujo (bullet journal), writing
Hacker News, Dev.to, Medium?
Newsletter emailing lists - writing newsletters
Product directories - Product Hunt, Betalist, Product Startups, SaaS directory, any Nuxt or Vue directories

Anything else?