My Studio/ Guestroom redesign

I am participating in the Design Challenge at Debra's Common Ground

I have this great room to redecorate and move my office into that I want to also function as a guest room.
The way it looks now is bad.  typical boy. Don't come in my room and do anything mom!
I know it's messy, but this is the reality, now, but not forever.

I want the wall above to look like this sketch.

And this wall where he had the bed right on the floor.

To get a vintage bed post and old nite table... like in this sketch