Yes, absolutely. Ceiling does look higher. The whole space feels more open, cleaner, and airy. It's a pleasure to be there, after 25+ years of being kind of a utilitarian space. So there's hope for all of those boring spaces in our homes, y'all!

Just because you had a coffin lid before, doesn't mean it need remain so. Your goal and the surrounding areas are missing.If you're in progress...... you did a kitchen, or SHOW the kitchen... but nobody can advise based on your info thus far. Show the rest of the spaces beyond and flesh out the missing information....and the feel you want throughout.

Should I do Chantilly lace Matte for the ceiling and Chantilly lace semi gloss for the doors and trim? I like that idea.

I think that painting the ceiling planks white is perfect for your beachhouse, it just needs to be accessorized correctly so that it doesn't look too white and gray (see illustrations below). For the walls, I suggest a light greige, BM Balboa Mist, that mixes well with white, gray, and wood. Or a neutral gray such as BM Gray Owl. Any paint you choose I highly recomment that you paint a large cardboard (available at Dollar stores) with 2 coats of paint (samples available at paint stores) and walk around the room to see the colour in different lights. For your corner fireplace, it looks like something black on the floor under the fireplace, not sure what it is but I would do a black porcelain tile under and on the sides of the base. You can also replace the spotlight on the ceiling by a more modern black one, Amazon has nice ones around $40. Have fun with your project!