[kaptain]

A lot of the posts here focus on content. I would focus on process. Since you're new to the job your head WILL be spinning, so it's important for you to setup a way to work through the "newness".

Bring a notebook and a timer. Understand what your immediate report's expectations of you are and then set up a schedule for yourself to help yourself meet those expectations. I'm assuming that since it sounds like you're new/junior hire, the expectations, at least initially, will be low. Use this time to create a rhythm for yourself on a hour-to-hour, day-to-day, week-to-week basis so that you yourself can see your progress and understand what you're doing.

Nothing is more discouraging than being pumped for a job, putting in a lot of hours, but not really realizing where the time has gone (which was my experience initially) with very little positive results to show for.