Non-Fiction Book on Simulation Theory prepare and publish for Kindle

I need help with putting into Kindle specifications (from Word), cover design my 80,000-word non-fiction book on Simulation Theory.

Requirements include:
- Prepare correct specifications for both Kindle and Paperback
- cover design (front, back, spine)
- Uploading and publishing on KDP
- ISBN, barcode, and copyright registration
- Integration of high-ranked keywords
- KDP assistance
- 3D mockups

Ideal skills and experience:
- Experience with KDP
- Strong design skills for book covers
- Familiarity with non-fiction formatting and publishing for Kindle

Please provide relevant samples and a detailed proposal.