Requesting feedback on my main floor's plan.

I have a few questions on my main floor's plan. Here's the image. The bathroom is in the upper right corner, three's a small closet next to it on the opposite side of the wall from the refrigerator's back. There's a door to the basement at the top part of the stairs and an entrance to the stairs to the upper floor right next to the front door to the house at the bottom of the diagram. The two central squares in the middle of the room are a chimney (the large one) which will be removed in a year and a support post for the beam which will be structural.

https://preview.redd.it/i7jjyi89cvye1.png?width=443&format=png&auto=webp&s=812f1afafab6000fb7c7f8be4fd5f797189f18bf

There's an implicit 4' hallway that goes from the front door, 45 degrees across the kitchen island, and then directly up to the back door. I will keep this area clear of furniture and obstructions.

I'm interested in any feedback anyone has but here are some burning questions I have myself.

1. To the left of the stove I have the refrigerator and to the right of the stove is the L turn in the counter. I know I need some landing space there on either side. 15" between the refrigerator has been recommended as a minimum. Sounds reasonable. What is the minimum distance I should have to the right of the stove give it's up against the L turn? Space is limited there. Is the 8" I have enough?

2. The room at the top (back of the house) is a rear entry way, lets in a lot of light, and I might use it as an office with a desk to the left wall. How long should that little separator wall be? I've considered zero. I've considered enough to make it an actual separate room with just a 24" door in that wall. I kind of like the short wall I have there now, letting in light, but providing the desk a left hand wall to hang things on or place objects against.

3. Should there be a wall between the front door and the living room? I have a 2 ft wall there now just to allow the living room to have something like a sofa or end table right up against the wall but preventing people who enter the house from clumsily knocking things off of that table or what not. It also gives visual separation from the entryway for the living space.

4. Where would you put furniture and of what kind? I was thinking of an L shaped sectional sofa in the center of the room facing down into the living room, 4' off the stairs to create a hallway into the kitchen and then a love seat against the bottom wall at the front of the house. A dining table in the upper space just left of the kitchen.

Any other comments welcome.