Here is a picture of the living room from when I moved in

in. Curr

If a rectangular room layout is beyond your capabilities are you sure you can navigate from your home to work each day?

You could easily change out the sofa and two chairs for a small sectional if that is your reference. This plans makes the room appearance spacious and allows those in chairs to view the large screen TV on the opposite wall.

Even though it is called living/dining it is really only living. You can eat at the peninsula but there is no space for a table.

@BeverlyFLADeziner thanks! What size sofa would you do? And do? And y do? do?

BeverlyFLADeziner sorry for the typos. I can’t use the app properly…

A longer sofa if it's placed on the window wall. A shorter sofa like 84" if it's placed on the short end of the rug. Don't select a sofa or chairs that are overly deep. Use an 8x10 rug in the room.

Don't use the HOUZZ app. Posting and commenting on the computer is much easier and allows you to edit and delete.

Here is a photo of an open plan like yours.

Position the sofa against the 126" wall; add rug just for that area, with coffee table, two chairs and front legs on rug.

TV on 108" wall.

The layouts above are good. You may want to purchase a coffee table that raises up to dining table height for the times you may want dinner guests or need a table to work on.

You may want to add a coffee table that lifts up for eating. Here is a link with some examples of coffee tables that lift up like the one in this picture.

Link: Coffee Tables that Lift up for Eating - Search Shopping

Congratulations on your new apartment. Wishing you many happy days and wonderful memories in your new aparment.

Since you’re starting with a completely blank slate, I’d resist the temptation to make the living area fill the entire length of the room. I think the sofa on the 126" wall and the TV on the 108" wall is the strongest starting point.

I’d define that area with a large rug, sofa, coffee table and two lighter chairs, with at least the front legs of all the seating on the rug. That will make it feel like an intentional room within the larger open space rather than furniture floating in a long rectangle.

Then I’d give the remaining space a separate purpose instead of trying to fill it with more living-room furniture — depending on what you need, it could become a small dining/work area, reading corner or console/storage zone.

Since you have the rare advantage of choosing everything from scratch, I’d also decide on the overall mood before buying individual pieces. I recently transformed the same living room four completely different ways, and it’s interesting how much the same basic space changes just through the design direction, lighting and focal points. It might give you some ideas before you commit to furniture:
https://youtu.be/R-2ZyyBc6EY