Pre-orders are not generally recommended for debut self-publishing authors—only for well-established ones with name recognition. Traditionally published authors will almost always have a pre-order period.

For traditionally published authors:

Publicist Jeffrey Yamaguchi has written a 4-part series on driving pre-orders. It may require you to pay, but if you’re serious about it, it’s likely worth paying.

Advice for indie authors:

• A beginner's guide: https://www.janefriedman.com/a-beginners-guide-to-amazon-pre-orders/
• BookBub: https://insights.bookbub.com/promote-preorder-books-drive-real-results/
• More from BookBub: https://insights.bookbub.com/should-you-make-a-book-available-for-preorder/
• And even more: https://insights.bookbub.com/preorder-strategy-build-books-platform/