We need dimensions of the same to give the best ideas.

Agree about dimensions and maybe clarify -- seating area for you when having a coffee, or a seating area to talk with clients, or...?

Do you live here or is this just an office?

What is your current budget range for office furniture and what does it need to cover? Two desks, office chairs, lighting, bookcases, filing cabinets, printer stand, closed door storage? Fancy coffee machine, bar, and supplies?

If it were me, I’d clear everything out so you can see/understand the space better and it has the added benefit of removing clutter and anything not needed in the room - sell the extra items on facebook marketplace

la_la Girl has the right idea. Move everything out to begin with. If you are reusing any furnishing (desk, sofa) move those back in and shuffle them around until you have an arrangement to works for you. Then you can begin bringing in any other pieces you will be reusing. Lastly you can accessorize.

Agree dimensions will help. Is that a door or window with stain glass? Maybe another picture from couch side toward other side

What do you need in the space? What can go elsewhere? I would get rid of anything not needed as a start, then play with laying put what you have and it will tell you what is still needed

All I see is amess and we need a to scale floor plan before evn beginning to advise. You also need to provide info as to what kind of stuff is needed for the business you use the office for. Like how many file cabinets , is there a clset that can be used to hide stuff that can go wireless. I see avelvet sofa does that stay I see a huge need for storage for sure. ,