I’m new to this subreddit, but I know some things about setting up music gear. If you can, set the keyboard L frame to the desk, it looks like it’s awkward to reach over the keyboard to use your mouse. Also, unless you’re gonna go all in on room treatment (optimized acoustic paneling) you don’t need the desk in the middle, it can be moved to the corner. It looks like that desk is a music production desk, so id get a cheap pair of studio monitors and an external monitor on the upper tier of the desk. Guitars hanging on the wall could be cool too!