Room in a shared flat

Hello,
I live in a very pleasant, bright and modern house, in a quiet neighborhood, very close to the center of La Neuveville. This small town is very well located with a train line served every hour towards Bienne or Neuchâtel, with road access also allowing one to reach these two larger cities in 15'. One can easily practice walking, cycling, water sports in the lake. Cultural life is also well developed there, with cinema, very active theatre, concerts in the old town in summer.

This house was full not long ago but now, the top floor is empty since my three children have all left the house. I am looking for an ideal flatsharing formula for myself: sharing a common kitchen space in good agreement, respecting each other, complementing each other for the maintenance of the house and eventually the garden... and above all not invading each other's space.
I will be 58 years old and quite logically imagine sharing this house with someone in the 40-65 age range but in the end, everything is possible if it is simple.

The photos of the space available concern the first floor. There are two closed bedrooms, an open distribution area that can serve as a living room or a library, and a small bathroom. I have already tested a flatsharing experience with a single person with great satisfaction. Based on this first experience, I am now considering two possible formulas: a single person who takes the entire top floor or two people from different backgrounds who each take a bedroom and share the bathroom. This is obviously to be discussed according to the profiles of the interested persons. It is possible to remove the furniture to allow you to furnish to your convenience. The kitchen, however, is on the ground floor.

Spoken language French. Welcome for Italian, English or German... an opportunity to make progress for me perhaps!
NB. A female cat also lives in this house, but most of the time outside.