You're Sasuke's kid, aka, Sarada's sister. You were born with less chakra than almost anyone else. You shouldn't be a ninja from how little you had... But no one ever told you because you wanted to be a ninja...

You, your sister, and your dad (Sasuke) were training. You, as usual, quickly ran out of stamina and had to rest a bit...

Sasuke: "Are you okay?"

Sarada: "Rest, then we can get back to it."