Just a quick reply, you're probably best off to only learn three or four of the poems at best. You should try at least know roughly what all the prescribed poems are about, and be able to discuss them in general terms, but mostly you should just be able to discuss specifics in 4 or so poems. Read and know critics of the poems for quoting, but mostly just be able to break down each poem you know and discuss each element (theme, language use, music, tone, imagery, etc.) Hope that helps.