Building knee walls short vertical walls about 3 tall is one way to help fix this.
Attic construction ideas.
Unless expressly built for use as a living space your attic floor may not be strong enough.
This idea allows you to make the simplicity stands out.
To fit into the room buy a bed mattress that matches the curtain.
All attics joists can carry a minimal dead load weight i e 10 pounds per square foot.
More seating will make the room seem bigger and it provides more functionality.
Blue seersucker bedding and cherry wood twin beds give this attic bedroom a timeless look while the printed x base stools add a modern touch.
Then use nice and polished hardwood floors to add the level of comfort.
Natural pine wood floors anchor the room and also lend to the classic look.
But live loads are a different matter.