If you have just set the plan, where you wrote "Südwest" it is actually South. Southwest is more like at half past seven ;)
Therefore, I would keep the west side free and maintain more distance to the neighbor, because one probably spends more time there in the summer. Also, I would position the house more towards the east so that you have less trouble with the long shadow in the evening from the neighbor to the west.
A breakfast terrace can be planned more flexibly in the northeast or southeast or somewhere smaller in between.
Also, you wrote that the eaves side must face the street. That would not be the case for you, unless you are planning a semi-detached house or a single terraced house.
Do you intend to build only a carport or do you want/have to build more parking spaces?
I would move the carport/garage a bit further to the right because of the southwest sun, so that it still connects to the house but also serves as a privacy screen.
Personally, I am not at all a fan of hidden entrances, and I would also not design the preferred terrace location as an entrance.
Why don’t you want a west-facing terrace?