I started out on the Midnight Sort as a Loader, so I guess I was "Outbound". The names of the jobs change but they are still the same thing. I used to load three trailers at once. Sometimes I stood by the belt as a "Pickoff", which means I pulled the packages off the belt and put them on a set of rollers for the Loader to load. I later worked "Irregulars", which are the odd shaped packages that couldn't be sent down the belts.
I expect that you will spend a lot of your time wondering "What in the world am I doing working a job like this".