Verse 2 was part of the previous episode, and is repeated here. There are two parts to the verse, and one looks back, while the next looks forward. When Nephi spoke of his father making an end of speaking of the dream, Nephi looks back to the end of the last story. He is now moving to the next, and his father’s words are still part of the development of the next story.
The next story is really about Nephi and his own vision of the tree. However, we will understand both Nephi’s and his father’s dream better, if we understand that what Nephi expounds, concerning what his father taught after the end of speaking of the symbolic dream, will also be the very thing that Nephi learns from his experience.
The introduction to what Lehi says returns to Lehi as a prophet in Jerusalem. It reprises Lehi’s call to preach repentance, else Jerusalem would be destroyed. The point here is not that prophecy, because Nephi has written of that before. The point was to return to the beginning point of Jerusalem and use their departure as a starting point for prophecy of the coming Messiah. The Messiah is the focal point of Lehi’s next teaching.