걸 배우게

learn things

→ 것+을
phrase Uncommon #14,619
learn things 걸 is a contracted form of 것을, meaning “things” as the object of the verb. 배우게 is a form of 배우다 (“to learn”) and usually connects to what follows, so the full phrase depends on context.
KO: 여행하면서 새로운 걸 배우게 됐어요.
EN: I got to learn something new while traveling.