I am in the process of setting up my sewing room where my office "used" to be. Got tired of stuff scattered in different rooms, tucked out of sight, which means out of sight, out of mind for me! I really didn't like using a corner of the diningroom, which is small anyway and using the table for sewing on. I started on Tuesday... cleaning, sorting, searching, and I'm really getting "there!" It's coming together. And I didn't have as much stuff as I thought.
Good luck with your cleaning. You'll love it when you're done.