You're missing a wall and you're missing measurements. Please provide another photo taken from the wall where the settee is. What are the measurements? Is this is a loft space? Not enough information to really help you yet.

It’s an 8ft x 8ft space and yes, it’s a loft area that leads into stairs. Thanks for your help

Thanks for the extra photos and information. Here's how to configure your loft space.

--Take advantage of the open space in front of you. Move your current desk to face the open space. Your face will be well-lit from the windows for Zoom meetings and you won't be facing a wall all day. . Get a great office chair on wheels.

On the left side (as you're facing the windows) run desktop/tabletop across that entire wall with file cabinets below. Since you'll have a rolling office chair, you can extend your work space onto the side desktop. Put a very large bulletin board over this side desktop for business and for adding art work, photos, etc. to personalize this space.

Add a comfortable reading chair + ottoman or recliner where you can put your feet up. Add a warm, patterned rug to anchor your pieces. Go for this feeling for your office space--bright, lively, efficient. Add one or two desktop lamps so you're not entirely relying on overhead lighting, which can be depressing.

Get a floor to ceiling shallow bookcase to put in the niche for your books. If you still need more bookcases, line the back wall with bookcases. These are usually easy to find on Facebook Marketplace, Craigslist, etc. Try to match the finishes in the office so it looks professional, so you feel professional. Good luck with your upcoming year!

You might look at getting a bookshelf and turning it side ways to fit where the bench is now. You could even do a console table there for more storage if needed. Then look into a rug to place in the space to make it feel more cozy. It looks like you might need a better desk, so getting one that is more substantial might work better for you. Then look at a computer chair, some artwork, lighting if needed, and some plants.

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Some kind of shelving system where you have the current bookcase will give you the needed storage. You can put your printer on the system as well.

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Can you provide another picture on other side of settee towards other blue wall and where chair is?

There's a lot to be said for having cut-to-size desktops from big box stores or Ikea then placing them on a couple file cabinets. That's what I suggest for one wall while keeping the current desk fcing the loft end of the space. It's so much cheaper and more adaptable than looking for a bigger desk. I see OP already has a rolling chair. With an L-shaped set-up, she can roll from desk side to desktop side.

This reminded me of her space with bookcase in niche and desk in front of a loft window:

Don’t think seeing the back of your 2 monitors from the room below would be a good idea if placed in that loft opening. Where the desk is now lets you see who is coming up the stairs and the window to your right. Depending on your budget and tastes an “L” shape is a good option. Computers stay on the current wall and the “L” runs on your right below that half wall. An “L” gives you adjacent workspace for writing/crafting/non-computer related work.
Check prices from a Closet Design company or The Container Store on custom sizes to fit your space. They should have the file storage and the bookcases you need. Others in this thread have shown good ideas for the book storage - next to the column or maybe built in the niche on the left next to the stairs. You could also consider a sit-to-stand desk for your computer & monitors then customize the rest of the furniture to finish the space.

Streamline with built ins so the space doesn't feel crowded with the bulk. Of furniture. These don't have to be expensive. Have a handyman install shelves that span the blue niche. Fill with books. Add a nice boxes with lids on the lower shelves for plugs, chargers, and other kinds of office supplies.

Have a simple L shaped desk with minimal legs placed against the wall.

I have images of a kid crawling up on your desk and falling over the edge. I'd add a glass panel spanning this area that increases that railing area height an an extra couple of feet.

Add a rug to the floor.

IMO you start with the desk , how big do you need Position thta where you feel comfortable and able to see outside would be a must for me. Then I think bookcases and cabinets first chosen for function . Do you really need a bunch of shelves filled with decor items ? It is your office to be true but it is a first a workspace IMO. Make a list of the things you NEED then the pretty stuff if you want it I like my office to be just a work space nothing decor wise at all. Take all the stuff out that you have then put back what you need , Your home needs books and storage so address that since that will stay after you go back to work . For one year I would not spend huge money so maybe an IKea desk that at some furture date can go into a childs room or play space