Other than a chair, do you think there's room for more furniture? I'm not sure there is. Do you need anything else in there for functionality?

If no other furniture, what specifically are you looking for help with? Picking out artwork and things like that?

Thanks @Nicole R I really need to put two more chairs. It is a pastors office which means I do counseling. The need is two more chairs apart from the desk chair (Which needs to be small one) because of the size of the desk. Then I need to pick a colour for the wall. I don’t want that blue one. I need something that match the wood (maybe a kind of green) and from there some art wall. There is a lot for such a small space : / a rug or not a rug? What type of rug and colour? Etc. Thank you for your help.

What a lovely space. I agree to rotate the desk 90 degrees in order to be facing guests when they enter the room. You can then place two guest chairs facing the desk. The ceiling appears to be high, a rug would help to cozy and ground the space. IMHO I would keep walls and rug neutral and simple. There’s a lot of surface (bookshelves) to add character.

Is the back of the desk finished? If it is, I agree with rotating it.

Thank you @Joy M you are right the ceiling is high and a rug will help a lot. My o my concern rotating the desk is that I don’t want to be facing the window, I will be very distracted. @Nicole R the desk is finished at the back. You mean that I can put the office chair between the desk and the window? I am a little bit confused :( sorry.

I think she meant put your desk so your back is to the wall of book shelves. Float the desk in the middle of the room. That way when you’re sitting at your desk, the window is on your left and you look up and see people coming in and they sit at the two chairs facing the desk.

@Wealthy thank you. Got it!

The dimensions are incorrect I know, but this is basically what they're suggesting:

If you're opposed to that, here are two other options that would require your desk chair to swivel.

@Nicole R and @Weathy got it. Thank you so much. I like the idea. I would love to put two swivel chairs in front of the desk. Any suggestions?

That is great! @ Nicole R I will play with the space tomorrow. I love the graphics @Nicole R thank you so much.

Here are some swivel accent chair ideas from Overstock.com. The Carson is the narrowest at 25” wide if space is an issue.

Thank you @Weathy great suggestions!

I’m sure there are much better sites/apps but I use www.planyourroom.com, because it’s very quick and easy.

Well friend, a question :) what do you think about this swivel chair???? Swivel Chair for the office.

That space is too tight and extremely confining with the floor to ceiling bookcases on each end. What I would suggest is you remove the bookcase on the right side of the desk, take it out of the room entirely and if need be, put it in storage. Not that difficult to take out. That will free up at least 10 to 12" in depth and also make the space more friendly and not as closed in. Then you have room for two chairs, one in each corner. Also remove that drapery, its too much for the room. If need be install some inexpensive blinds that don't project into the room.

The plastic desk chair floor pad is doing you no favors, looks terrible in there. Either go bare on the floor with wood-friendly rollers OR use a decorative rug in the space.

If the bookcases have to stay, then get the chairs as small as you can. I'd use Hancock and Moore # 1801 Captain's chairs which are very compact (24" deep) and open-looking so as not to crowd the space, and pretty comfortable .

Less is more when working spaces such as that.