Hi! I am new to piping. What is the best consistency buttercream for doing scrolls on a cake? I do not have a very steady hand, and I'm very nervous to make a cake for a friend wanting a white cake with black scrolls!! Any helpful suggestions, other than practice, practice? Thanks!

I suggest a medium consistency. Now, that mean different things to different people.
Whatever consistency is comfortable for you to pipe with, but not soft enough to loose it's design or sag.
Not much I can suggest except what y ou already know - practice, practice, practice

Thanks! Practice practice practice, where to find the time?