Idon’t want someone to write it but rather explain it more to me i’m having a hard time writing it

Just pick a topic and write what comes to you, like the first words which pop into your head, poems don't really need to rhyme so as long as the lines have similar length, it'll sound fine. If you're confused about sound devices, an onomatopoeia is a sound, like 'Bang!' or 'Crash!', alliteration are two or more words in the same line that start with the same sound, for example, 'the scorching sun blinded Sally's eyes'. Some more examples of sound devices include rhyming, this is a great website for finding words that rhyme, https://www.rhymezone.com/. Rhythm is another sound device, this has to do with syllables, if a line has the same or a very similar amount of syllables, it'll be rhythmic.

Hope this helps,

Cate