ᐅ Initial Floor Plan Design for a Single-Family Home – Your Opinions?

Hello dear forum community.

After a long and more or less intensive search, I have a plot of land in sight that fits quite well into our search criteria regarding location and orientation.
At around 500m² (20m x 25m (66ft x 82ft)), the plot is not exactly large. That’s why we have now created initial sketches to see if our ideas and wishes can be reconciled with the size of the plot. The floor plan is based on our first ideas and personal needs. Since we are both in our late 20s and still live in a condominium, we probably haven’t thought of everything yet?

We look forward to your opinions! Please feel free to be very straightforward.

Builders’ requirements
Style, roof shape, building type: modern, roof not important, no sloped ceilings
Basement, floors: no basement, 2 floors
Number of persons, age: 3 persons, 2 adults, 1 child planned
Office: 2x home office
Overnight guests per year: max. 10
Open or closed architecture: open
Conservative or modern construction: modern
Cooking/dining/living combined
Number of dining seats: 8
Garage, carport: at least 2 garages
Other wishes/features/daily routine:
- sheltered terrace
- controlled ventilation system
- open and non-compartmentalized floor plan

House design
Who created the plan: do-it-yourself
Preferred heating system: geothermal with ground probe sounds interesting
Energy-saving regulations 2016 (EnEV 2016) should be met, no more than that

Why is the design like it is now?
- Most ideas developed over time in our minds

What is the fundamental question about the floor plan in 130 characters?
What do you think of the floor plan? What are absolute no-gos from your point of view? What have we overlooked? (Also regarding children)

Info about the first sketch:
Above is a neighboring house
Below and to the left are fields
To the right is a small street

Edit: location of the plot uploaded. (North is at the top)