If you want to study that poem and think about poetry in general, I recommend you check this out. It really breaks down the poem, almost like you’re getting a lecture on it.
I recommend that whole site. There’s lot of study guides on things you may have studied in high school, or may not have. It’s never too late to read Yeats, or Shakespeare, or Eliot. If anything, it is better to study it later in life.
Smart People I Know 