A kitchen should have a hearth raised above floor level, like the one in this castle kitchen
Note also the “chimney”. It’s a section of wall with an opening for the fireplace. The smoke goes behind it.
There’s a section showing how the smoke hood might work on this page, scroll down to the heading “Firehood”
I think the fire window is pretty good, I saw one at the 1820’s farm I visited in Tasmania two years ago.
Where does the smoke go after it goes out of the smoke hood. what happens at roof level?
Here’s the outside of Poplar Cottage at the Weald and Downland Open Air Museum
Where’s the chimney? I think the smoke comes out of the triangular dark patch at the top of the gable end wall.