What should I do before I can start working?

Your manager will assign you to new shift schedules, this shift schedules will be your schedule on certain period of time. 

When your manager has assigned new shift schedules for you, you will receive a notification to confirm them. Additionally, you can see the banner on your home screen.

Tap "confirm your new shifts" to check your new assigned shift schedules. Review it carefully and if you accept this schedule, tap "confirm assigned shifts".