Professional Help with Interior Design Improvements

I am seeking professional input on how to modernise and improve my home interior, because the flat is very old and feels quite dated.

The main challenge is the floor: it is a very strong colour and unfortunately I cannot change it. I am also stuck with a lot of the "antique" furniture.

For this reason, I am looking for suggestions in terms of small changes that make a big impact (painting walls a different colour, changing bathroom fixtures, door handles, accessories, things like that). I do not need a rendering.

I would send both photos of the rooms in question and a video of the whole house, because I'd like it to feel cohesive.