Input needed on studio/practice area

This room is used for both band practice and for recording of the band. The layout of the wall dimensions are as shown. it also has a 9'-0 drop ceiling with 2X4 acoustic tiles. The floor is carpet on concrete. There is nothing in the room at this time and I am basic ally looking for placement ideas or possibly acoustic treatment ideas. Thank you in advance

To start with I'd rotate the desk 90 degrees so it's facing the left wall. cheers john

Thanks John. With the desk rotated facing the left wall, what would I need to do to treat the angled wall with the door in it? Also I have attached a link to the Sketchup file if anyone is interested. The sketchup file is exactly as the room is now with no acoustic treatment so feel free to give me any guidance. As far as a budget for treatment it is about $1000-$2000. Sketchup File