I quit my dream job at YouTube to become a full-time creator. It was the best career decision I've ever made.

Alex Costa said quitting his job at YouTube was the toughest, scariest, and best career decision of his life.

Amy Sussman/Getty Images for Critics Choice Association

• Alex Costa quit his dream job at YouTube for another dream: becoming a full-time content creator.
• As a men's lifestyle vlogger, brand deals made him a millionaire.
• Now, Costa's own grooming brand Forte Series is on track to do $10 million in revenue this year.

This as-told-to essay is based on...