First of all, congrats on your new place! Very nice layout. I think the navy where the wall paper is, would look great. The other walls looks like they are painted a light beige/tan. Your ideal look is definitely white instead of that color. White maybe be the trickiest color as there are so many shades of white. You'd want to use a crisp white that doesn't have any undertones. With just the accent walls being navy, I don't think you'll need to worry about it being too dark at night. It looks like you have a fair number of canned lights that will help. I can't tell what the colors of the sheers are, but white sheers would pop on navy walls, and will help break up the navy. The clean flat front of the kitchen cabinets look modern, so you are good there. Your local paint store might have a color expert that take look at your place and give color recommendations according to what you're trying to achieve. Please keep us posted, would love to see how your place turns out.

I'm a big fan of off white or white or light cream on that pine paneling. Can't give you an actual color though because you'd have to check and see how it goes with your tile and floor. But love the photo's you've attached. I think you are on the right track

Yes, they do look similar. Even with a primed wall it can be hard to tell on a computer screen. Paint some large pieces of core board or poster board. Another option I've seen here on Houzz is ordering sample boards of the colors you're considering. I think it's samplize.com.

here's a link to what woods and color work together. https://shorelinepaintingct.com/blog/best-hardwood-wall-color-combinations/