What a lovely home!

I am not a fan of how you painted the ceiling. I prefer it all white.

Then, I would paint just the walls above the board and batten.

In this case, yes you would need to change out the pictures as they would blend in too much with the walls.

Add a rug under the table and from that you can figure out material for chairs.

Beautiful dining room! Paint the top half navy.

I find the board and batten forcing the art to be hung too high but I love navy walls and especailly since the ceiling is already done . I find the china cabinet a bit odd for the space and IMO a nice buffet would be a better choice Yes you need a rug and then choose the covers for the chairs . I also do not ever like angled seating at a table it is so limiting I would suggest a nice round glass top if you want a glass table in quite thick glass and since I am not sure of the room size I can only guess at least as large as what you have, IMO if plants are not healthy do not use them and I always like drapes in DRs

Thank you all for your opinions. I will work on getting rug. I plan on painting walls above trim navy and doing white curtains. The China cabinet was my grandmothers(which actually still smells like her house) so I would like to keep it and the table. What do you think about turning China cabinet in corner to the right of where it is, placing accessories on top and possibly balancing out other side of room with tree?