We need aplan where we can read the measurements and in feet and inches since this is a US site. We also need info . How many people live here , can you use a murphy bed easily ? Or a sofa bed . Waht are your needs for the space ? Post all of that here in comments the darwing psted here in jpeg format DO MNOT start another post.

Yes, the main area is what I would like help with. It measures 15.5 ft wide by 20 ft in length. It is one of two apartments I just purchased for rending them out. I have in mind that it would be for either a single person or a couple who would use a queen size bed. I think there might be space for even a child or two a couple might have. Open to sofa beds and other space saving ideas. The main priority is laying out the space in a way that feels open, spacious, and inviting. such a feeling, I believe, can only be produced by a layout that flows well.

just the basics. small dining table in kitchen (could be wall mounted drop down)

Sofa and a couple small swivel chairs wall mounted TV an area rug to gound the seating area.

I’m a fan of Lone Fox youtube videos. He recently decorated a studio apartment that looks like a similar size to yours. Here’s a few screen you might find helpful, and a link to the video. https://youtu.be/VntG-KAjavs?si=jEMFImHDg5jTCMe6

You might look at different small apartment or studio apartment ideas on here. Note in these designs below there are a bed, desk, chair, TV, storage, and you could potentially add a small dining area depending on what other things you need in the space.

pied-à-terre in the clouds, 200 amsterdam, nyc · More Info

Watersound Beach New Construction · More Info