The word "salvation" can be translated as a verb. Alternate translation: "when the time comes for me to save you" (See:[[rc://en/ta/man/translate/figs-abstractnouns]])
Here the word "covenant" is a metonym for the one who establishes or mediates a covenant. See how you translated a similar phrase in [Isaiah 42:6](../42/06.md). Alternate translation: "make you be the mediator of a covenant with the people" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here the word "land" represents the cities in the land that had been destroyed. Alternate translation: "to rebuild the ruined places in the land" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Yahweh speaks of the land as if it were an inheritance that the people of Israel received as a permanent possession. It is implied that the servant is to reassign the land to the people of Israel. Alternate translation: "to reassign the desolate land to the people of Israel as their inheritance" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-explicit]])