What should I learn and how could I learn that?

Well, IF you wanted to learn about

1. The origin of the universe
2. The origin of mankind
3. How mankind spread across the globe
4. The relationship between rights and laws
5. What kind of gods humans have believed in over the millennia
6. Why we should be very aware of dictator conquerors
7. The role of genes in our lives
8. The dominant role of Values, Assumptions, Beliefs and Expectations about the way the world is or should be (VABEs for short) and how VABEs dominant rational decision making
9. How to become a person
10. How to find your purpose in life
11. The nature of biological mating
12. How to build relationships
13. The nature and impact of CULTURE (if you had been born in a different part of the world, think how your world view would be different!)
14. Stories of real families from all over the globe, not just one region
15. Best insights and learnings of several modern executives
16. The nature of Air
17. The nature of Water
18. The nature of Money and how to manage it
19. The challenges that face our world going forward (including the danger to the Commons -air, water, soil, flora, fauna, and the underpriliveged)
20. and how the Earth will die

THEN read A Song of Humanity: A Science-based Alternative to the World’s Scriptures by Only One Man (me). Getting Below the Surface and/or A Song of Humanity 20 years of data gathering, 20 pages of references, 900+ footnotes.
Yes, that’s all there. A foundational guide to who we are and what we need to know to live rationally.