Pudddy

Hi, we're embarking on our first RC cruise at the end of January. I've searched the forums and online and am having some trouble locating details on tipping etiquette for things like drinks. I know there are pre-paid gratuities, and that ordering a drink adds an automatic 18% gratuity, but am curious if anyone tips an additional amount when ordering drinks above that or if general etiquette on the ship is that the automatic gratuities cover it? Just curious if I should essentially be adding a few dollars to any drink order at the time of ordering or if the staff there generally expect that to be covered through the automatic 18% added.

I'm on this cruise with my family. First RCC cruise and have only sailed on Disney prior to this. Ship looks nice and we're excited to try them out. Any tips for first timer on this ship?