What is the connection between this account of the death of Abraham and the prophecy of warring children in the womb of Rivkah (Rebecca) and the accounts of Creation and of the Flood?

Studies on Parashat Toldot, covering Genesis 25:19-28:9.
What is the connection between this account of the death of Abraham and the prophecy of warring children in the womb of Rivkah (Rebecca) and the accounts of Creation and of the Flood?
What do the following six important women in the Bible have in common? How did their experiences shape the future of the people of God?
After Sarah’s death Abraham had other children as well and we learn how his estate was divided up between his heirs. We also learn how Yiskhak (Isaac) deals with his status as a wealthy patriarch in a hostile land and how his two sons start fighting over Yiskhak’s estate before they are born and continue fighting over it when they are adults. The fight appears to end with Esau “despising” his birthright. But does this really end the dispute?
Messiah Yeshua (Jesus) is called the firstfruits of the resurrection (1st Cor. 15:20), and why are we called firstfruits of creation (James 1:18)? Pentecost originally was a celebration of the firstfruits of the wheat harvest and followed 50 days after the celebration of the firstfruits of the barley harvest. What is God teaching here about Yeshua and us?