I don't think knowing the theory behind poetry is particularly important in terms of being able to write good poetry. Instead, I recommend just reading poetry. Lots of it. And try to read from as many different poets and eras as you can and find elements that you like and adopt them.
Having said that, the theory will be handy when it comes time to bullshit your way through the proposal and viva voce(s).
Oh, and good on you hello2u2 for having a UAI goal that isn't 99+. Happy writing!