I just dry brushed some white paint on for now. What do you think? Should I cover it with white paint or leave it as it is?

I would love to have a ceiling fan in this room! I still need to add some trim and do the floors...
I'm planning to paint the walls a pretty color too.Speaking of paint. Do you use flat, satin or semi-gloss paint in your houses? I used flat paint on the walls here. I think it might look better with a little bit of shine?
I'm having trouble getting the right shades of paint. I've painted the exterior shutters four times now!
I started to draw lines on one shutter to see if I'd like more detail. I think I'll just paint over that. I also have some tiny starfish that might look cute on the shutters.

The acrylic paints I've found in the stores are too bright for the interior. Can I mix them with latex interior white paint to lighten them up? Have you ever mixed up your own paint colors? What did you store it in?
I think I'll make a couple of twin beds for this room. The ceiling is too low for bunk beds but that is another idea I had. You need to have lots of beds in a beach house for all of the guests!This is my first bed and mattress. I still have to finish the linens for this bed. I just keep getting distracted with other things!
Thanks for any advice you can offer me. It's fun to see at least one room coming together!
Blessings, Kathi