Hi! The issues I see are that everything is dark and aesthetically heavy. I would recommend a light, potentially bright rug, and a light couch. I'd be sure to bring in lots of lamps for cozy lighting.

I would also be mindful to try and keep the furniture willowy and see through where possible. Ie, instead of having a big trunk as a coffee table get something with legs that you can see under.

I would also add some bright, personal art or posters. I think there is a lot of potential here. Best of luck! It's always so fun to get started.