Long plot (150 sqm)

Hello everyone,

I have a long plot and have tried to create a floor plan here; it should preferably be around 150 sqm.
It is not perfect, which program (online) can I use to do this well?
The living area should be at the top by the windows.
On the left, an office and then a bathroom. The 10 m is, by the way, the total length of the house.
The utility room should be at the bottom right.
I don’t have the upper part yet.

Thank you very much

Unfortunately, I have no program recommendation. I would start with hand drawings. There is a questionnaire for floor plan questions here, using this there is a lot of help and feedback.

Well .. hampshire already mentioned the questionnaire ..https://www.hausbau-forum.de/threads/grundrissplanung-unbedingt-vor-Beitrag-Erstellung-lesen.11714/ .. and it also says there that a site plan with measurements of the property is useful.

... can the pinned posts be highlighted a bit better with another style so that they stand out more to new users? Thanks, that would be nice.