Can you post a diagram of the room, with wall and window dimensions?

Actually, I would think about putting that bed across the corner where the art is. That also puts it across from the entry which is said to help you sleep more restfully and securely. You can try it at your house by angling it right there in the corner where it is. I don't see any electrical outlets in this room; I'd get an electrician in if that is the case.

What does the wall that we cant see in the pictures look like? If that wall isn't usable for the bed I would think about building out the wall across from the door to make a nice level place for the bed to be.

We need a floor plan with measurements.

That's the one, Celery! I really think that's the only option, but the bumpouts will change it slightly. Its the lack of electrical outlets that bother me. I suppose battery lamps could work.

Bed should face the window so you are not looking at the wall when you wake up.

me - I prefer to have blackout and/or not be near the window because of morning sunlight.

Why are those bump outs there? Can you take them down so that you'd have flat walls?

How about th wall on the right when entering the room. Do you have to open the right door? IMO I would leave it shut or take it out and put wall yu only need one door to enter the room

Need a floorplan to place anything logically. You own this flat, correct? Once furniture placement is decided, have an electrician come in and add some outlets, especially if you are adding a workspace. Doing a good job is very important and that space needs to be functional, and getting a good night sleep is also just as important. I’d advise against combining them in the same room, but since you are in a flat, I understand the limitations.