Aang nods, watching Bucky for a few seconds before tentatively beginning to copy him. Aang's fingers are quicker and more nimble than most people's, so he's well suited to the task, but he still goes slowly, giving the blade the respect it deserves (like Jeong Jeong would want). He'd rather not slice his palm open.

"Like this?"

He's being too cautious with it. Too careful to keep it away from his skin that he might fumble and cut himself because of it. It's similar to his approach to firebending.