Where to start with this breakfast nook?

I know there is a lot to be done here, but where do I start?

We have a matte black kitchen (I don't like it too much, too dark) and this bench that is connected to it. I want the space to feel airy, happy and cozy, but right now it feels very dark and crowded, but empty at the same time (hello big empty wall).

Our furniture is second hand and doesn't really match. Table top needs to be fixed - should I just sand it down? Chairs are yellowed and old. Should I paint everything black? White?

I made some new pillows for the chairs, but regret the color - too dark. Unsure what to do next.

I really like 70s style - lots of color, warmth, fun art, plants, texture, but unsure if it can be combined with the kitchen and sage walls. So I'm kinda halfway and doubtful. Our house is brand new.

I know there is a lot to be done here, but where do I start?

We have a matte black kitchen (I don't like it too much, too dark) and this bench that is connected to it. I want the space to feel airy, happy and cozy, but right now it feels very dark and crowded, but empty at the same time (hello big empty wall).

Our furniture is second hand and doesn't really match. Table top needs to be fixed - should I just sand it down? Chairs are yellowed and old. Should I paint everything black? White?

I made some new pillows for the chairs, but regret the color - too dark. Unsure what to do next.

I really like 70s style - lots of color, warmth, fun art, plants, texture, but unsure if it can be combined with the kitchen and sage walls. So I'm kinda halfway and doubtful. Our house is brand new.