Trials of Youth: During your childhood you underwent a coming of age event that greatly impacted your life. (Work with your DM to detirmine what this event is)
Pickpocket: During your adolescence your family fell on hard times forcing you to turn to petty theft and other criminal activities involving you with criminal organisations.
Approaching adulthood you experience wanderlust and decide to travel, roll 1d6 to detirmine years spent travelling and think about where your character might have gone. (work with your DM to determine details)