If you are having a hard time putting down the visual you see your mind, close your eyes, immerse yourself in the scene and then type. Don’t worry about mistakes. Don’t worry about wording. Just write what you see in as much detail as you can. When done, open your eyes, fix the spelling errors (there will probably be a lot!) then edit. It is amazing how easy it is to put down in words what you see in your mind when there are no distractions from what is around you.