A bit. Being wise, the course creators preferred not to attack your brain with the entire paradigm — you mostly focus on simple sentences (so, if a noun is in an oblique form, it rarely has an adjective around). It is what teachers usually do in class, anyway. For a beginner, it is enough to know that an adjective agrees with the noun it modifies.
You can look up the whole paradigm here. The cases go, to to bottom, as follows: Nominative, Genitive, Dative, Accusative, Instrumental, Locative.
Note how Accusative forms are only unique for adjectives that modify feminine nouns (you can see it in the table; for the rest of the nouns the Accusative will copy either the Nominative or the Genitive, depending on where it is a living being or an object/concept).