This chapter tells the most memorable rituals and teachings, the most memorable events and God's will in the Old Testament.
No ceremony in the Jewish congregation is more meaningful and important than Passover, and no ceremony in the Old Testament is mentioned more in the New Testament. The details are killing and eating Passover lambs, sprinkling blood on the lintel (this is a very special thing), and observing Passover for the next seven days. This ceremony was told to all Israelis and taught them to abide by it.
In the Jewish congregation, there is no more obvious arrangement of God's will than this one, and there is no more frequently mentioned one, that is, the people of Israel were rescued from Egypt by God. All the firstborn sons of the Egyptians were killed, and Pharaoh and the Egyptians urged the Israelites to leave quickly. The Israelites started their journey with their dough and basins, Egyptian gold and silver, women and children, and many others.
The Israelites baked raw bread on the road, and the date was recorded in detail to commemorate God's power and his will. The point of this chapter is that God Abram called him to leave his family and his people and go to the land indicated by God, and promised him to become a great country.