Juliana

i want to take a cruise by myself. All I want to do is lay in a lounger, read, watch the ocean go by and when I raise my hand a drink magically get put it in. My question is: is it possible to not spend a dime while actually on the ship? Im going to get the drink package and just stick to the included dining options. But if I don’t do the spa or take it a show, is it possible that when I see the bill at the end of the cruise I won’t owe anything.