The first step is to decide what you want to accomplish with the cellular shades, curtains or roman shades. Are you looking for privacy? Block sunlight? Or solely to dress the room, so to speak. You also need to know what your budget is. You can easily spend thousands of dollars on window treatments.

One long shade over those four windows is going to be heavy and possibly hard to manage. Then again, four cellular shades can be tiresome to open and close on a regular basis.

Roman shades are attractive but they block a lot of light even when open, and completely block the light and the view when closed.

What do you use that room for? It looks like you have a project table of some sort in the middle of the room?

And I just noticed: That looks like a patio door on the right, but I don't see any way to open it.

Are you familiar with sheer shades? They might be a better choice than cellulars.
sheer shades

I'm sure that what looks like a patio door is just a floor to ceiling window - a bit odd, but it has no hardware and no way to open that I can see. As for the four windows, they appear to be casement windows that swing open to the outside. Since they open separately, they should have separate coverings, as you may want to open only one window at a time while keeping the others covered.

For the sliding doors, I might make the curtain rod extend further on each side, but I think I would only use sheers on this door, since it is protected from the exterior by another room. How many of these sections actually slide? It looks like the one on the left might be fixed; the center certainly slides, but it looks like the right one slides also. It would help to see the various possible open configurations.