When thinking about space its always best to 'sketch' to get an impression first - pull in sensory details, collect first then carve out the space. Record everything you observe then pick the details you want to expand on.
Don't over describe a space - make space for the reader to inhabit. Push against making a photograph with words. Have an image that calls the readers body into the poem - instead of describing the space, bring the users body into it. Let go of trying to be understood perfectly and experiment/play with how you create space, knowing that your reader isn't ever going to exactly recreate the scene you are seeing.
Don't be worried about incompleteness let the reader do some of the learning/processing. Introduce some uncertainty to be explored.
Set a timer for 3mins and give yourself the freedom to free-write. Once you have a week or so of material highlight whatever stands out, cut it out and collage it on your floor. Then go for 'what is dangerous.'