As you begin reading through the book of Genesis, it is helpful to pay attention to the structure of the book. The structure is where we get the English name of the book, based off the Greek tranlation "Geneseos" of the Hebrew word, "Toldot", (Gen. 2:4) which can also be translated as record, account, or generations. The book is a record of the generations of man and the origin of the land in which God's people would eventually dwell.
The Toldots, or records, can be spoted throughout the book, which slowly narrow their focus their attention on the family that God would set apart for His own and through whom the Messiah would eventually come.
This shows us that whicle God is the primary character in His story, the theme of His story is the redemptive work of Christ and the restoration of man to God.
Here is a breakdown of the various Toldot's, or records, as found in the book of Genesis.
Creation (1:1–2:3)
2. Ṭôleḏôṯ of the heavens and the earth (2:4–4:26)
3. Ṭôleḏôṯ of Adam (5:1–6:8)
4. Ṭôleḏôṯ of Noah (6:9–9:29)
5. Ṭôleḏôṯ of Shem, Ham, and Japheth (10:1–11:9)
6. Ṭôleḏôṯ of Shem (11:10–26)
7. Ṭôleḏôṯ of Terah (11:27–25:11)
8. Ṭôleḏôṯ of Ishmael (25:12–18)
9. Ṭôleḏôṯ of Isaac (25:19–35:29)
10. Ṭôleḏôṯ of Esau (36:1–8)
11. Ṭôleḏôṯ of Esau, father of the Edomites (36:9–37:1)
12. Ṭôleḏôṯ of Jacob (37:2–50:26)
Allen P. Ross, “Genesis,” in The Bible Knowledge Commentary: An Exposition of the Scriptures, ed. J. F. Walvoord and R. B. Zuck, vol. 1 (Wheaton, IL: Victor Books, 1985), 22.