Reading Nook Bed
This is a bed built into a reading nook. In order to build this you should combine bookshelves and barrels as walls, stairs as a roof, and two bed on the floor. This design has lots of storage for your items, but also looks super cool in most bases. Hidden beds are very popular in Minecraft these days, and this design could be a great option for you. Customize this build with coloured beds. To add more privacy, try adding in banners as curtains on the entrance of the bed. You could even have the banners and the beds coloured the same to make the build more unified. As usual, please let me know how your build turns out :)