Design for a single-family house with 160-180 sqm - suggestions for improvement?

I think there is a fundamental flaw in the plan. If I understand correctly, the upper part of the living room will be on the garden level.

But that is rather impractical. The kitchen/dining area should be located in that part, because from there you will access the terrace for grilling or chilling.

Therefore, the questions about the corridor etc. are obsolete without furnishing sketches etc.

The garden side would be to the right of the living room; there where the two large windows or door are drawn

The garden side would be to the right of the living room; there where the two large windows or door are drawn. Is 1.2m enough space between the stairs and the hallway wall or is that too narrow?

The bathroom slides completely to the left in its shape. In return, the living room basically gets a reading corner (1.3m wide and 2m deep)

Based on the above measurements, I don't understand where 5x3 m then comes from? *pondering*

Can you please provide a current plan of the ground floor and a site plan or and exterior views?

1.20 m rough construction dimension is tight and narrow

This is how it would look