Once the trash can and then please start again from scratch.
At the stairs, you run into the wall on the upper floor and attic. This ruins the entire floor plan.
Actually, you wouldn't even need to continue now, but I still want to point out a few more mistakes.
The rooms on the upper floor can be used as storage rooms, but you probably don't really want to offer that to your children.
The toilet and bathtub in the master bathroom are also unusable due to the lack of ceiling height.
In the guest toilet, you can be observed from the technical room while using the toilet. In return, the technical room itself is a dark hole.
The corridor to the technical room is too narrow.
The stairs are also a dark hole.
Depending on the size of the TV, the 3.49 m in the living room may be quite tight.
The wardrobe is missing.
The exterior views are likely to look very bare.
In my opinion, the stairs are wrongly placed in the corner. This results in many long corridors or you avoid them by making such tubes as entrances to the rooms, like you. Both are expensive wasted space.
Preliminary questions should also be clarified. Can you even build 2.5 stories?
Where is south?
Are you allowed to build that much area?
Is the budget even sufficient? Roughly estimated, this will probably be over €400,000.