Is the floor plan for a single-family house structurally realistic?

We have planned the floor plan of our future single-family house according to our wishes. However, before we look for an architect or structural engineer, I would like to ask here whether the floor plan is at least somewhat structurally realistic.

Exterior walls: 50 cm bricks
Interior walls: 30 cm bricks

The dimensions refer to the interior measurements (so excluding the bricks).
On the right side, I have fewer concerns. But can the left side be realized as planned (without any extensive special arrangements)?

Thank you very much for your help/opinions.

Of course something like that can be realized, the dimensions are not huge after all. However, which measures are necessary (wall by the stairs made of reinforced concrete, beams, etc.) can only be told to you by the structural engineer.

Maybe a thicker blanket is needed :) It's the same with us... now becoming 30cm

I am still looking for the entrance.

The kitchen seems tiny to me. How deep is it? 2m?

Thank you very much for your quick responses :)

: Do you know the rough price difference between a "normal" 4-meter wall (30 cm bricks) and a 4-meter concrete wall?

: What thickness was originally planned? How much more did the thicker ceiling cost you?

: about 2.90 x 3.10 (so not quite 9m²)... too small in your opinion?

The entrance is next to the garage door ;)