A Close Reading can be a bit overwhelming at first, so you want to take this one step at a time.
Once you have chosen a focus, you now want to find a quote. You might focus on a specific word choice within the quote. You might be looking at examples of figurative language, such as a metaphor or simile, both of which are very common in poetry. Consider the following lines from the poem "Harlem" by Langston Hughes:
What happens to a dream deferred?
Does it dry up
like a raisin in the sun?
Notice that I have focused on just three lines to start. You want to break things into manageable chunks. In the first line, you will want to pull out the specific word "deferred," as this has very specific connotations. You will also want to consider "like a raisin in the sun," which is a simile. Now that you have chosen a couple of lines, you will want to analyze them.