I tried living like this, but I couldn't. A couple more things I need:
sheets: both a fitted sheet for the matress and a second loose sheet on top
some kind of blanket or comforter on top of the sheets
two pillows, one "soft" and one "firm".
That being said... tables? A chair? Who are you, the King of France? In fact you don't even need the matress, just get a futon that you can fold up for more space and use a laptop on top of that, like I'm doing right now.
Matress needs to be off the floor to prevent moisture from being trapped between the mattress and ground causing mildew/mold. More of an issue in humid places, but still - prop that bad boy up on some bricks or something idk
Needs a better chair and more ergonomics around the desk. Otherwise you'll be happy momentarily, but after a few months your back and other body parts will be quite unhappy with you.
Lol I'm actually thinking about how to design a long and narrow bicycle camper with a bed, a foldable reclining armchair top that goes on the bed during the day, a split ergo keyboard on the armrests, and a monitor that can be easily pushed out of the way. This could fit into a space about 3m long and 1m wide.
The roof / top half of the camper could be moved up or down for transport aerodynamics. Kinda like a "vanlife" mobile battlestation. But I'd also want a mini kitchen and a burner and a place to shower and poop. Lightweight similar to teardrop campers but where the roof is flat so the top part can fit over the bottom half. And with lightweight solar panels ofc. And with windows all around that can be stoppered with lightweight XPS panels in cold weather.
When I was a bachelor in my college days, I didn't have much more than this.
Easily the focal point of my living space was my computer console, which got a little crazy. I had a simple table for a desk, and on it was a surround sound system for my PC (a big JVC one... Speakers strewn around the room), keyboard, mouse, PC, some knick knacks.... I had put together some wooden boards to build a stand over my JVC amp so my monitor could sit on top of it, a huge 25(?) Inch CRT... My computer tower was to the right... Directly to the right of my seat I had my printer (I was in college after all. It was a generic inkjet), and a mini fridge. In the corner, between the printer and computer, I had a small pile of equipment to give me some extra functionality, like an old desktop that I remoted into, so I could have stuff running that I didn't need to use up resources on my main computer for... A network switch was over there too... Etc.
To my left was my storage area, a small shelf and a dresser next to it. Behind the desk area was basically a bed with a night stand for my alarm clock, and a hanger area because I didn't have a closet. I don't have any pictures from that era, as this was before smartphones had decent cameras and storage.
That space was my life back then. I still remember every detail, from the knick knacks on my desk to the sound the fridge made when it opened.
I don't need to cram my entire life into one room anymore, so I'm a bit more spread out, but my computer station hasn't changed a lot. I switched almost entirely to headphones, so goodbye JVC, and everything has been changed or upgraded, but a lot of the same elements are here. I relocated my PC to under my table (it has it's own smaller table under my big table), and I have more monitors now, which are thankfully not CRTs. My bed and storage stuff moved to another room, but the layout and principles of my original design and layout of my desk is still very apparent.
I might have one picture I can scrounge up that I took of it when I had moved into my parents place between semesters, all laid out the same. I have no idea where that picture might be though. It was awesome for a mid 2000's battle station, and I had basically no frills about my life at that time. Everything I owned had a purpose. As long as it served that purpose, there was no need to change it. I loved it just as it was.
I keep seeing ads for those big beds with the built in couch/desk/fridge/bookshelf/recliner & I don't think my productivity could handle me having one of those in my life.