Difficult plot due to hillside location

Hello everyone,

I need your help. How would you position a 12x9m gable roof house (with basement) and a 7m long/6.5m wide double garage on this plot?

The only road is located on the south side.
The plots on the west, north, and east sides are family-owned, where transfer of setback areas has been assured.
On the west side, the garage may be built up to the property boundary.
To the southeast, there is a wonderful mountain view.
No KfW house, no photovoltaic system, no solar system.
Wastewater must be pumped to the south towards the street using a lifting station. Rainwater goes 50m across meadows to the northeast.

I hope you have good ideas for me.

Thank you very much

Please also include the dimensions of the property.

Oops, I forgot. 34.5m long and 21.5m wide

Why are the dimensions of the house already fixed?

What is the building envelope? How busy is the street?

South-west the garage next to the house with the 9 m to the south In the basement kitchen, dining, living. The windowless side gets the technical installations. This allows direct garden access. Although not a large south garden, there is no shading caused by the residential building. Behind the house, a north garden, there could still be west sun in the evening. The ground floor gets the entrance and bedrooms. The attic is for storage and the remaining rooms.

How is the building envelope?
How heavily trafficked is the road?

The road is very lightly trafficked.
We are subject to the outer area statute. The building envelope is not directly specified.