What are the 6 Russian cases?
The six Russian cases are nominative, accusative, genitive, dative, instrumental, and prepositional. Each case marks a noun's role in a sentence by changing its ending.
Which Russian case should I learn first?
Start with the nominative, then learn the accusative and genitive. These first three cases cover much of everyday Russian usage before you move on to the prepositional, dative, and instrumental cases.