Hi! I know I am not mr Kate but maybe I can help. I have a little studio myself.
– Invest in a big cozy area rug, for your conversation area or/and for your bedroom-part. Rugs are awesome for designating area’s and make them feel their own instead of everything being in one big room (as is the problem with a studio).
– Hanging some art really brightens up a room, and makes it feel personal. The same goes for plants.
– Invest in light that is not hanging from the sealing, but offers soft warm light at eye height. This really cozy’s up a room.
– You can colour part of your wall in a deep/rich colour. For example the part of the wall where your bed is or the wall in your kitchen.
I hope my tips were of some sort of help!
(as I have watched all of mr Kates videos on Youtube allready, another great youtube channel is House&Home, with lots of decoration inspo)