Window Coverings
Dark wood shutters are the perfect choice for your window coverings if you don’t want to leave your windows uncovered. However, this style generally allows windows to be bare.
To make your home decor more casual, you can use white gauzy fabric for your curtains.
For a formal kind of look, you need heavier curtains with colorful choices. You can pick from the colors I mentioned above, such as terra cotta or warm yellow.
Wall Decor
In original Mediterranean style houses, walls are nearly always textured with a layer of paint, glaze, or concrete.
If you want to style your home with this style from top to bottom, you must consider adding layers to your walls (in at least one room).
You can hire a professional for your walls or go to a home improvement store. You will need materials like faux painting kits that contain the right paints and glazes to do this all on your own.
Considering wall art, I think one of the unique ideas for this style is hanging serving platters as wall decor. These create a more eye-catching look than any painting.
Try to incorporate some Mediterranean style pattern choices.
In addition to that, you can also use colorful still life paintings.