Help with remodeling my room?

Im going to be 19 in a month. My room currently has sky blue painted walls and carpet. My walls also has my paintings and band posters. I want to redecorate completely other than the carpet. I live in the hamptons, the ocean is a ten minute drive away from my house. I wanted to rather have a ocean/boat theme, a nature/hippie type room, victorian style room or French Parisian Decor type room. Trying to make the room a bit more sophisticated and my age instead of 16 and wild. Any suggestions of what colors to go along with a certain theme or decor items. Thank you!