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

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.

Or

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.

Ryu Ga Gotoku Studio's Project Century Gets A Strange New Title - GameSpot

You cannot effectively promote books

A) that are not actually books.

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

What are some sunscreens that are suitable for oily-skinned individuals and do not make the face look greasy or shiny after application?

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

E) Take a solid year to learn how to use Amazon or Facebook ads and be prepared to lose quite a bit of money as you figure it out.

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

Has anyone liked being made a cocksucker?

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

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.

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

Is Matt Gaetz qualified to be Attorney General of the United States?

Or

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

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.

Tom Sandoval Performs in Surprise America's Got Talent Audition, Reflects on Scandal 2 Years Later - TooFab

C) that are unreadably terrible in any other way.