Connecting Statement:

John continues to describe the new Jerusalem as the angel shows it to him.

showed me

Here "me" refers to John.

"the river flowing with life-giving water"

Eternal life is spoken of as if it were provided by life-giving water. See how you translated this in Revelation 21:6. (See: rc://en/ta/man/translate/figs-metaphor)

This is a young sheep. Here is it used symbolically to refer to Christ. See how you translated this in Revelation 5:6. (See: rc://en/ta/man/translate/writing-symlanguage)

Here "nations" refers to the people who live in every nation. AT: "the people of all nations" (See: rc://en/ta/man/translate/figs-metonymy)