Hi @vera.carla
I curate a list of writing contests and it turns out there are two similar to this that just started this week. You may want to talk to the contest owners and see what their experiences have been with this type of poetry/music collaboration.

Here's one: https://steemit.com/steemzine/@unusualconcept/musical-poetry-contest-themed-order-in-chaos

And here's the other: https://steemit.com/writing/@edprivat/lyrics-writing-steemit-competition