Are you looking for a chandelier for over the table or to replace the one currently hanging. I would not have a chandelier where you currently have it. Just do a ceiling light. It looks odd in that space.

Change it to a ceiling mount.

What sort of help were you hoping for in regards to decor? What style are you wanting for your home? Right now the chandelier and mirror feel more glam and the kitchen table, barstools, and pendant lights feel farmhouse. Which direction are you wanting to take things?

You have a great space so you won't need to do much to take it to the next level.

I’m not sure with what style stick to. I would like to mix them. I will be really glad for some suggestions and ideas :)

If I do a ceiling light instead of chandelier what is the option for the light above small dining table ? There is no electric box for light

Also if I can ask for advice what to do with window decor ?

remove the hanging light in front of the mirror, it looks more like an obstacle than a pretty addition. I would put a slim disk "recessed" light there instead, the pendants are the focal point.

Your art over the dining table is off center to the table I would adjust that. you could hang a faux chandelier there, with a battery opp light bulb.

For the window by the heater, I would do a roman shade or shutters.