Location kitchen and living room

Tada! I've got it. I have almost found the all-rounder. Unfortunately, it can't lay eggs. But I am satisfied for now with what I (with the help of my sister) have found:
The practice room will go downstairs, into the inner part. What is actually the utility room. It will be enlarged for this purpose (blue line). The red dashed line is what it originally was.

Because there is no window in the practice room, the long sides will be fitted as well as possible with window bands and proper lighting planning. Those are the dots in the drawing. They are meant to represent light in two directions.
To definitely have enough storage space, the living room wall will be moved one shoe length to the left/inside.

The kitchen moves from the middle part upwards towards the terrace and will get a kitchen sofa on higher legs at the table.

The middle part is now "only" 160 wide. That is enough for one or two armchairs (60 deep) and a narrow bookshelf (25 deep) and a passage (75 deep).

Hip hip hooray, this way I can keep the practice room on the ground floor and still haven't wasted space for it. Or have I missed something important?

Because there is no window in the practice room, the long sides are equipped with window strips as best as possible

I basically understand "train station" there. The room is ideal for claustrophobia exposure.

I basically don't understand a thing. The room is ideal for a claustrophobia exposure

I can also make money with that. It really isn't big, the room. But big enough for 2 people to sit in it. About 5.3m2. I know various other, similarly small meeting rooms. What else is "Bahnhof" for you?

I know of various, equally small meeting rooms.

In the medical field, I only know of changing rooms at the X-ray :-(

What else does "Bahnhof" mean to you?

A windowless strip of windows. Is that supposed to mean a transom window in an interior wall?

I am not very familiar with interior windows and/or their lighting. I still need to find out what is possible. I believe it is possible to illuminate the room at least decently and pleasantly. A window, even if it is not a real one, gives at least a better feeling than none at all. Even if the same lighting means are needed. And if a window can be built into the load-bearing wall, that would of course be even better.

I think the technology is in the room and all the piping / wiring is already planned?