Thank you GaudiGalopin for your remarks. I totally agree with the kitchen table which is too high, I should have lower it much more.
For the turning zones, I tried to respect them using the "PWD symbol" Sweet Home 3D model (149 x 149 cm) but, as I imagined more a renovation of a old house, there are also some places in this house where the character has to move back, like in "real life" (his study, for example, and also in his lift ; BTW I had to enlarge the Sweet Home 3D model which is more for standing people with walker).