The way I know how to say a poem is by reading how many syllables it has on each line.
I have a pet called lilly-soe
I have a pet called li-lly-soe =8 syllables
You may be asking about the pronunciation of the word. It is a two-syllable word pronounced something like this following.
PO-em, where the 'e' is a neutral unstressed vowel sound. It is similar to the 'a' in abut. I will sometimes make the e sound more like 'bet', but this is just because I like the sound. It is more correct to give it the neutral unstressed sound as described above.
Emdrgreg