Acoustic treatment for basement studio

Now i have a rough idea of how i am going to treat this space. But would love to hear other opinions on the matter. Im going to be putting bass traps in all possible corners, thats a given. As far as absorption i was planning on 2 foot x 4 foot panels for the walls. 3 on the left wall of the desk and 4 (maybe 5) on the right wall of the desk. I was going to do diffusion behind the desk and the small wall behind me where the stairs are. Heres the dimensions 12 foot 4 inches wide and 22 foot 2 inches long, ceiling is 80 inches from the floor. I plan on swapping the carpet for laminate wood flooring with a nice area rug. The two couches are going away and im getting one bigger couch. My main issue is should i do anything with the ceiling? Its ceiling tiles with a screw to joist grid, so not much room for insulation, and hanging something would get aggravating since im 6 foot 3 inches tall. My desk is 4 foot from the back wall and centered. Any opinions help. I cant upload photos for whatever reason