Hi Sonia,
That’s looking great!
I wouldn’t worry too much about whether it’s Low poly or not, but I’d say that Objects with a Subsurf Modifier (like the carpet) are not considered Low Poly.
Neither is modeling all the keys on the keyboards.
Also the vases, the desk lamp and so, seem to have unnecessary many Polygons for such relatively small Objects.
But aside from things not being Low Poly, it’s great and I can’t see any real Modeling errors.
The plant looks good to me as it is, but you can always try to Add a Displace Modifier (with low Strength) or use some Proportional Editing.
