http://www.ecostardoubleglazing.com.au/upvc-double-glazed-windows/

Something to consider with roller blinds- The blockout ones can really block the airflow in Summer, and if you do leave the louvres open, the slightest breeze will cause the bottom rod to bang against the window frame. You can fix them so they don't do this, but again you have the reduced airflow.....which is why you have louvres in the first place. We have the same problem. My son's bedroom. He seems to have adjusted to no window coverings. Luckily we have no privacy issues.

Different rooms will need diff solutions. You can hang blinds on the windows themselves or mount blinds or curtains on wall above window, just make sure they are mounted out far enough for the window to be tilted open and with curtains that you can draw them back clear of the window to allow it to swing open. Looks like you have wall space in the living pictured.

You could go with curtains that run across the whole wall that follow the fall of the ceiling. This would read as one large fabric ‘wall’ rather than two angled ‘slices’ of window making the space seem larger. A double track system with blockout and sheers would stop the hot sun and still allow beautiful softened light in the room and full view with curtains pulled back.