It doesn't take very long for the first recorded murder to take place. There are indications that Adam and Eve already had a significant number of other off spring from Cain's reaction to his punishment. Reading Genesis Chapter 4 (World English Bible)
The life spans of people before the flood were amazingly long. People could have known their 4 x great grandparents. Then, there is the special case of Enoch whom God took. Reading from the World English Bible.
Angels don’t show up a lot in the Bible, but every time they are recorded arriving they have to tell the person they are visiting to not be afraid. I made that into a game when my kids were young and I read aloud from the Bible to them a lot. (I read all of Luke chapter 2)
Death in this world is that unavoidable reminder of what is important. It humbles the most arrogant. It gives relief at the end of what can sometimes be a weary journey. It also reminds us that there is more than this broken world.
Joseph's brothers are sent to buy grain in Egypt, where they talk with Joseph, but don't recognize him, even though he asks a lot of questions about their family. He accuses them of being spies, then tells the not to come again unless they bring their youngest brother, which will prove they are telling the truth. When they need grain again, they finally get Jacob to realize they can't go without Benjamin. Judah promises himself as collateral. After hiding his silver cup in Benjamins sack, Joseph accuses them of stealing and says they can all go home except Benjamin. Judah pleads with Joseph to keep him instead so that Jacob doesn't die of grief. At this Joseph breaks down and reveals himself, at which his brothers become terrified. In the end, they go to get Jacob and the whole family to come live in Egypt. Read from the World English Bible
Under Joseph's management, everything in Potiphar's house prospers, but Potiphar's wife tries to seduce Joseph. He declines, so she accuses him of trying to rape her. Then everything in the prison of the king's prisoners is put under Joseph's supervision and prospers. Here he meets Pharaoh's cup bearer and baker and interprets their dreams correctly. Two years later, Pharaoh also dreams and the cup bearer remembers Joseph. Joseph is brought before Pharaoh, Joseph interprets Pharaoh's troubling dreams. Then Pharaoh makes Joseph second in command in all Egypt. Read from the World English Bible.
The Nephilim (possibly where the stories of Greek heroes come from) are one symptom of the pervasive wickedness of mankind before the flood that corrupted the whole earth. Read from the World English Bible.