And lower the two pictures. They look way too high

Hi there

I would put those two art works side by side on the hall wall, currently they are splitting the focal point and making your eyes dart between the two.

A headboard will help zone and soften the bed, ideally a dark wood would look great otherwise a nice natural finish fabric headboard.

Bring that lamp and plant over to the side table and do the printer change like the comment above. That timber is a little heavy in one corner it needs to spread out a little.

More layering with the bedding with a cute boho cushion, something with a little warmth - avoid grey.

You could pop one of those bamboo roller blinds over the office area, roll it up to use the office and roll it down when someone has come to stay.