The kitchen should be open with access to the terrace.
It is actually more about the sun no longer shining into the living area from the afternoon onwards. On the terrace, you will find enough sunny spots. From the terrace, you then look sideways at a wall... In return, you have some wind protection!
The garage will have a flat roof and be max. 2.7m high. As already mentioned, the neighbor's garage will then stand next to it, but unfortunately I don't know its length!
I think it will come down to a 6x6m garage, then the overhang would be just under 2m and the floor plan can remain as it is.
However, I would then have an 8m driveway in front of the garage...