do a single room/space coastal first. pick the one thats easiest. it might work better than worrying about it all at once.

Maybe leave the bedroom for now and concentrate on the more public spaces .

Black is a great color for a coastal vibe once you combine it with white, linen & flax colors along with natural fibers like rattan, seagrass and sisal. Very sophisticated concept. Consider using shiplap on the walls to continue the concept.

Love black and white tiles in coastal homes

Black is great for accessories & when combined with distressed/weathered wood

Black works in the kitchen as an island

Black works when combined with oyster shell framed mirrors

Black and white for outdoor spaces.

Take color inspiration from this Italian resort perched on the side of a mountain.

B&W ikat rugs and fabric are a great way to extend the coastal/global vibe

Black, Linen, Greige tiles are a good way to continue the concept

Tropical plans are always a good addition.