become available/rich/a writer, etc.
A2
to start to be something
Dictionary examples:
After eating spinach, I became strong like Popeye! (0.0)
After drinking coffee, I became a talking machine! (0.0)
She ate so many carrots, she became orange like a pumpkin! (0.0)
They became great friends. (22.7)
That's when I decided to become a teacher. (37.1)