I agree that for this poem you need to consider what is abstract and what is concrete... however I have to say that I don't agree with
I am (concrete idea) a young woman eager for the future.
for the concrete, go through the words as you put them down, young woman is concrete, however, future is not. A concrete noun is something that you can hold in your hands, feel, touch, see, taste. "I am (concrete idea) a young woman eagerly waiting for the letter from my husband"; a letter is concrete. ( I do love the unanswered question for the abstract through! I love that idea; it makes me smile.)
Metaphor's are going to help a lot with this poem, just take your time, and thinka bout what is abstract and what isn't.