I would use some tall grasses. The roots would keep that soil stitched together well. They have little maintenance and look fantastic in the light and breeze.

Hi Niamh, as you say, Raveena sandstone is very colourful but I think your house could take it as it is quite neutral and the tones would blend. Also remember that the expanse of paving will be broken up with the addition of furniture and planting. I could see a large cream umbrella, cream cushions and some swaying grasses working in this dreamy, rural setting !

Anyone has any thoughts to help Ellie?

I agree, blinds, they are large windows so that is a lot of material / expense if you go down the curtain route, plus curtains may block out light. We have sliding doors like yours and have chosen to keep them free of any covering, however we are not overlooked. You might also want to consider translucent / sheer roller blinds which offer moderate privacy yet still retain a degree of visibility. We have them on our front windows for privacy as we are in a single storey house / bungalow, people can't see in (during the day) but we can see out. We also have curtains with them in the sitting room as we wanted it to be more cosy / private at night. In the other rooms we have another blind that sits over the sheer blinds, but this wouldn't work for all windows.