Learn how to write modern poetry: Personally, I think, first of all, you should learn to refine sentences. Poetry pays attention to expressing rich emotional content with few words and sentences. Secondly, we should use more parallelism sentences, and modern poems composed of many parallelism sentences are also very aesthetic. Modern poetry mainly needs to pay attention to its formal beauty, whether it rhymes or not. Just rhyme.
Books to read: I suggest you read more magazines such as Poetry Review, Poet and Modern Poetry. Second, read more books on poetry appreciation.
The above is a simple summary of my own study of modern poetry. See if you are interested in poetry creation, have hobbies and are willing to write. If you practice more, you will get good grades.