The first day on the job for any employee can feel like trying to get on a moving train, so have them "board" on a gradient. Get them apprenticed. Apprenticing is a VITAL missing ingredient in many practices. Don't just throw new staff in the water to see if they sink or swim. You should ideally have written materials of what is expected of them, and new employees should be given time each day to study those materials. The key is to not overwhelm anyone with too much information. Daily and weekly checklists also help.