: You have the wrong floor plan under control
Regarding the floor plan: In the kitchen, it looks like you are planning your fridge by the table. That would mean you have to squeeze between the "counter" and the fridge. The fridge belongs by the workstation, so near the sink, not by the table! Kitchen planning is part of house planning, so acquire kitchen know-how and then plan it correctly right away. You also have not considered the drainage of the bathrooms. Regarding that: simply swapping the dressing room with the bathroom is not the right way either! Is the sh*t supposed to rush past the dining table??? How is your masterpiece supposed to look from the outside? Your window planning seems to be a disaster – none seems well thought out. And if you rely on the Lower Saxony 2/3 rule for the floors, you should be able to apply it! Because there is nothing to be seen of it. A bit of solid basic knowledge is not really present yet?! I recommend, for example, to read other floor plan discussions, lots on planning on the web, or to study books. Then some things should work better by the 20th plan.
Where is the building technology going? The location/plot wouldn’t be bad either.