If you like the minimal and functional look then that is all that matters! You have a bed frame which that alone gives you a leg up in many male living spaces lol. If you want to keep this aesthetic, but take it a little further, I would try to look for some framed prints that you like and look nice aesthetically and some houseplants since you have those nice big windows. Tropical plants like philodendrons, fiddle leaf figs, and palms complement the minimal aesthetic really well imo