How does a new KDP writer supposed to market a book?

C) Persuade book reviewers on BookTok or Substack or someplace to recommend your book. If your book is unreadably terrible, this is probably impossible.

Are you planning to proofread your book to avoid sentences such as

B) Build a newsletter mailing list of people who will buy your book because they trust you to write books they want to read. This is slow, but ideal.

New $800 Blood Test Measuring Proteins to Reshape Longevity and Personalized Medicine - Business Insider

A) Build a following on social media, a following of people who will buy your books. Good luck with that. There is very little evidence that social media can translate to sales.

You cannot effectively promote books

What does it feel like wearing tights?

Because you cannot persuade readers to buy any book in which sentences do not make sense. This shouldn't be “does.” If you don't see the problem, that is a big problem.

If your book is well presented, well written, and basically free of typos, then

B) that are filled to the brim with typos or errors.

Quantum Vacuum Breakthrough: Oxford Physicists Make Light Emerge From “Nothing” - SciTechDaily

D) Pay promotion services like Written Word Media to promote your book. Legitimate services will not accept your book for promotion if the presentation is crappy or the book is badly written.

D) that are presented with bad covers, bad descriptions, or ludicrously bad interior formatting.