For starters learn thoroughly at least 3 poems from your anthology and analyse them, know them inside out and memorise them if required. In the paper I had, we had to compare it with an unseen poem so make sure you're familiar with breaking down unseen poems bc it can be daunting at first. The first step is to notice similarities and differences between the two in terms of language techniques and structure as well as context ofc. PECTAL paragraphs are your best friend, point, evidence, comparison, technique, analysis and LINK. These are really important, I'm not sure how exactly it works with your exam board but that's how it was for me. For the question where you have to analyse one from your anthology memorise and learn one which can be applicable to lots of scenarios, one that's flexible for any type of question...
Hope that helps, good luck and stay revising!