I would do that whole wall in drapes and then just stack back to the sides when not wanted That would aslo do the blackout item . Do you need privacy in the daytime ?I would just do solar shades if you want hea tor UV protection they will give you the ability to have the view and give you daytime privacy .

I would put Blinds.com Bamboo Top Down/Bottom Up Blinds on the side windows and a Rod at the ceiling angle with Grommet Drapery Panels for the slider.

(If it were my room, I would get a Drapery Rod long enough to fill the space side to side/corner(s) and includ panels on the qoutside of the windows... to close when you want total blockout.

When open they hang on the outside of the windows and at the edge of the door (or over the fixed door)

A light Cotton Slub fabric will give you the block out that you need and not be too full.

Blinds.com Bamboo shade come in white and a variety of natural shades... any of which would add warmth to the room and compliment your beams.

I'd mount the TV with a swing bracket, and put the chest of drawers flush to the wall, not on an angle. Same with the mirrror.

Since the windows' height is not the same as the sliding door, I would say pulling the curtains all the way to either end of the full set of windows might be a better choice.

For your blackout needs, I would recommend 2 or 3 layer blackout curtains, it would not look so "heavy" and provide great function.

I'm not quite sure what ”stone“ color you are referring to. If the color is close to light gray, I think the color would be good with the wood color and black of your room. I would also like to recommend light brown, beige or light beige.

I agree with your idea about the treatment of the two small windows on the opposite wall, nice idea!

Here are some inspo, hope it can help.

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I'd use blackout shades on all the windows that you want to block the light from entering, then use drapery panels to "dress" the windows on both sides of the long wall of windows. You wouldn't need as many panels this way. Using enough material to cover all the windows and doors would be much too much and you don't really have enough room to stack them back either on the ends or between the windows/doors.

It's a tricky situation because you have sliding doors, and you can't place a shade on each door, you'd probably need one large one mounted high enough so as not to impede the function of the doors.

You can get blackout option on cellular shades, solar shades, and roman shades, so that's your choice. You may want to hire a designer or company experienced in the many options to get the best result.