Publishing at Amazon KDP

You'll need the following:

• An account at Amazon KDP
• Your manuscript source document - EPUB format is best
• Keywords
• A book cover image which should be 2,560 pixels in height x 1,600 pixels in width
•  A book description

Join Amazon KDP at https://kdp.amazon.com Amazon will expect your name, email address and a good password (12 or more characters including mixed case, numbers and symbols)

Once you've created an account sign in.  Publishing at KDP is ridiculously easy and is something I wouldn't consider employing someone else to do for me. There are some areas which KDP make unduly complicated though, such as using MS Word to make the TOC (Table of Contents) that an ebook needs. The ebook management program 'calibre' is much better at doing that.

You can start publishing right away by clicking the 'Create' button, but if you are new to publishing I suggest you take a look at the resources offered first:

Create a book - a guide to how to use KDP
Timelines
Free ISBNs (Which you won't need for a KDP ebook)
Tools and resources - most useful of all.

When you click 'Create' you'll be taken to a page where you can choose what you want to publish. To make an ebook select that.

Having selected ebook you'll be guided through a sequence of three pages:

Kindle eBook Details - On this page you'll need to enter:

• The language used - You have a choice of 41 languages (although I am curious as to their offering of 'Scots' since they also offer 'Scottish Gaelic')
• The book title and subtitle - This should be what is on your cover and both combined are limited to 200 characters. Subtitles are shown as optional but remember that adding a subtitle which includes some of your keywords does help your book be discovered.
•  The book series - if there is one. This section is optional and can be added later if needed.
•  The edition number - Use 1 if this is your first copy. Later, if you update the book, you can add decimals e.g. 1.01 for a minor change or 1.1 for a major change.
• The name of the author.
• The names of other contributors - you have a choice of 'Author' (co-author), 'Editor', 'Illustrator', 'Forward', 'Introduction', 'Narrator', 'Photographer', 'Preface' and 'Translator.'   
•  Description - A vitally important section which is worthy of its own page here.
•  Publishing rights - If you wrote the book choose 'I own  the copyright...' or if you are publishing a book for which copyright has expired, choose 'This is a public domain work'. Note: the latter limits your royalty to 35%
•  Primary Audience - you must declare here if your book contains content unsuitable for children. You can also declare the reading age for children's books if you wish.
•  Primary market place - If you are writing in English I suggest you leave this as Amazon.com since the US has by far the largest number of English readers.
•  Categories - this is where to set the genre of your ebook. You can select up to three.
•  Keywords - Another vital section worthy of its own page. The keywords help readers find your books. Remember these are NOT single words.
•  Pre-order - You have the option of delaying the release of your ebook. I suggest you don't do this if your manuscript is not complete. If it's written but not yet fully edited you can use the time to complete editing and start book promotion. Setting a book release date means that on that date you will get a sudden influx of sales which can have a dramatic effect on your sales rank and ebook visibility at Amazon.  

Kindle eBook Content - On this page you'll need to enter:

• Manuscript - Upload your EPUB file here. Amazon also accepts KPF files; a format produced by the program Kindle Create, and .doc/.docx files.  The two easy options are using Kindle Create (especially for graphic novels and cookbooks) and EPU
  Note: This section allows you to protect your ebook with DRM (digital rights management). I strongly advise you NOT to select this, It doesn't protect your ebook from piracy but makes it more difficult to transfer between devices and in my experience seems to encourage book piracy. Every ebook I used it on when I first started publishing has been pirated. 
• Kindle eBook Cover - If you haven't created a cover, this section gives you the option of using Amazon's Cover Creator program. It's possibly a start but a properly designed cover is better. The cover you upload should be a jpg or tiff file.
  
  The image at the right was created in minutes using Amazon Cover Creator. The image used is copyright free and depicts someone using an old computer. If I was creating this book I would look for a better image. The text flows from top left to bottom right in the same way as a reader of English would normally track their eyes.
• AI-Generated Content - In this section you must declare if the manuscript has been produced by an AI. That is defined as text, images, or translations created by an Artificial Intelligence-based tool. Currently there are a number of legal cases over AI's use of copyright works so I can understand Amazon's concern over this.
• Kindle eBook Preview - If you've uploaded the manuscript and cover image you'll find, after a minute or two, that this option will become available. It gives you a good idea of what the ebook will look like on a variety of devices
  
  At the right hand side you'll find a list of items which may affect the quality of the ebook. In this case a number of made-up words to do with time travel were picked out as spelling errors. The previewer was told to ignore these.
• Kindle eBook ISBN - The last section gives you the opportunity to enter an ISBN (International Standard Book Number). Kindle ebooks don't require these, they use an ASIN (Amazon Standard Identification Number) instead. You can leave this section blank even if you have arranged an ISBN number since it won't appear in the book details at Amazon.
  Note: It you do have a free ISBN number from a firm such as Draft2Digital then they become the publisher.