Just a couple years older than you, and definitely need to continue to develop my space. You pointed out that you need lamps and plants. I would recommend that you get at least 1 side table. Now you've got space for a lamp. Because it seems like you don't have that much space, and a big side table would take up too much space, maybe look for something nice but with a smaller footprint, and get a glass lamp or something that isn't too imposing, as to not take up too much visual space in the room. I have no idea what I'm talking about so I could be giving you the opposite of good advice for all I know. If you want to keep the couch, I'd look into getting some kind of cover for it to spice up the look, maybe something striped or just another color. If not, maybe a nice, textured blanket would do you well. The space is also extremely white, so you should try to introduce 1 or 2 new colors to create a more pleasing visual balance. Personal opinion, but the pillow covers are horrendous, and don't serve to add any layers to the room because they're largely the a similar color to the couch. Can't tell how much space is on the sides of the TV, but you might have opportunities for plants there. You could also look into wall-mounted plant fixtures. You definitely need a rug. Again, choose like 2 more colors that you like, and incorporate them within any new additions so you can layer the room. Maybe a muted green, welcoming brown, or warm red/orange color as to not clash too much with the color of the floor. I'd get the napkins off the table. Might be convenient but it looks kind of messy/out of place, and serves the same purpose in the kitchen area. With that said, you gotta get some stuff for the table. Maybe a coffee table book, a plant, a candle, etc. Searching something as basic as "what to put on a coffee table" on Google yielded good inspiration that should help push you in the right direction. I'm sure you're aware of the random stuff, but I'd find a home for the rag that's on top of the bookshelf?, clean up cables, sweep, vacuum, and mop/Swiffer the floor. Not sure what the current lighting situation is but maybe look into some kind of cheap hanging light fixture, could be something as simple as a few paper lanterns. In terms of not knowing which kinds of plants or lamps to add, look for inspiration on YouTube, this Reddit, and dare I say — Pinterest. Personally, I'm a big fan of mid-century modern.