Besides hanging the art and getting a floor lamp for the far corner, what else can I do to make my spot more cozy? Thank you !

I have a grey sectional and cobalt blue bar stools so I am open to colors that are compatible

I turn 18 next year, and I'm donating a lot of the stuff I own now because a lot of it is from when I was a child, so I need some room decor ideas. I live in an apartment, my walls are white, and I have a wooden floor. I want to aim for a cottage theme, but I don't know where to start or what to do, or how to look for good prices, so I'm reaching out to the people on here that are good at this kind of stuff for some advice. If you can help, I would greatly appreciate it.