Sorry, new to this. Here’s the wall

If you want suggestions, we need to see the entire space as if we're in the room ourselves. Please post more pictures showing all for walls and\or surrounding area.

1. Should I paint the beadboard? I don't see beadboard...are you referring to the wood below the colored wall? I would have all the walls in the room the same color.

2. Should I tone down the accent wall with a different color or paint it the same colors as the rest of the room? I'd paint it the same as the rest of the walls.
3. What type of art would you recommend for this space? Hard to say without knowing what is on the remaining walls in the room. Can you post more pics of the space, not just the "accent" wall?

I would paint it the same color as the rest of the walls. Looks like thats what I see on the right hand side, and its a lot lighter color too. The shiplap boards below it, can stay white like the trim, or could be painted same color, as walls. Its up to you. Leave it for a bit, and see, if you like it once you get the lighter paint on the top.

This is BEADBOARD.

I would consider removing the wood wainscoting from the one wall. It seems to have no basis for being in the room.

The wall can be drywall and simply painted a color if you like and then add art above your sideboard.

Thanks for the clarification on beadboard. Here are a few more photos of the current space with the text art. I also need to figure out my curtain situation.

Full layout. Highlighted is the “accent wall”

If you like the shiplap trim on the dining room wall then leave it. But I would paint the upper wall either the same as the rest of the walls or a soft color pulled from your pretty dining rug. I like the vibes you have going on in your spaces.