1)
What salvation is discussed?
1.
Radak: It is salvation of the Nefesh in the world to come.
2)
What is the connection of the two halves of the verse?
1.
Radak: Your Torah is my delight because it brings me to salvation.
2.
Malbim: I desire Your salvation because via it, Torah can be my delight, and I will not be Batel from Torah due to afflictions.