Something neuroscience-y that helps with prose: attention is selective. A character will not notice everything in a room. They will notice what matters to their goal, fear, desire, training, wound, or obsession. A jealous character notices hands. a hungry character notices food. A soldier notices exits. A lonely character notices pairs. Description becomes character when attention has a bias.
One of my favourite series, Rivers of London by Ben Aaronovitch has a running thread through the books that his main character loves architecture. So we regularly get a tangent about what sort of a building he's in or how much he thinks a house costs, which is a really smart way to add depth to description, especially when that same character is a trained police officer who has been taught to notice things in detail. By adding an element of distraction to his observations it tells us something about who he is. Yes he's good at noticing everything that's plot relevant but he's also easily distracted and has strong opinions on Brutalism.
