For you, nothing seems to be a problem because you are not a planner.
From old times, when every rental apartment was granted a basement room.
Anyone building without a basement must still provide a sufficiently large storage room. A guideline is about 6 sqm. More is also possible.
Of course, this must be seen in relation to the apartment, hence the term "sufficient."
So, I played around a bit and planned two floors.
South is to the right of the plan, utility and multipurpose room on the ground floor, the footprint is about 15 x 12.5, clearance areas are ensured.
I swapped the children's room on the ground floor again with the bathroom, so that no living/sleeping room has to look onto a car.
The rooms marked as bedrooms have space for a 3-meter wardrobe.
The children's rooms suffer a bit because of the storage room, but there's nothing to be done.
On the upper floor, there are two storage rooms for the upper and attic floors, accessible from the hallway. The corner is already very usefully planned.
