This is my poem so far and I don't know what to do, but I feel like it's not good enough:

It spawned like a vague shadow trying to uproot the walls. Like it wanted something. maybe to end it all
It's voice speaks like a thousand creaks

So basically it has to reflect significant themes in A Monster Calls in a poetic format with many poetic devices such as, metaphor, simile, onomatopoeia, personification, assonance, alliteration, and more.

Can y'all give me some leverage and some tips so I can do this poem without any stress? Thanks I will mark brainiest and put alot of points.​