Tips on arranging pictures in a bedroom

[allegretto]

We have a long rectangular shaped room with the double bed on a long wall but not centrally placed on that long wall. I am struggling on deciding how to put up pictures. Just above the bed leaves a long expanse of bare wall to the right (where there is a bedside table and an armchair). We don't have enough pictures (or want) to cover the whole wall! WWYD? Two groupings of pictures? One big picture and some smaller ones over the armchair? The bedstead is metal and is curved rather than straight which makes it harder, I think! A bit like this:
milchhouse.com/wp-content/uploads/2015/12/bedroom-furniture-dark-brown-polished-wrought-iron-bed-frame-having-curved-headboard-placed-in-front-of-white-stained-wodoen-frame-glass-window-cast-iron-bed-frame-936x936.jpg

Thanks!