Working as a production assistant, you work more for the production than the actual studio. All of the training I had happened on set while I was working. An assistant director gave me a quick overview on who was who on set and what I would be responsible for. I was then paired with a senior production assistant to shadow, gradually over my first 3 days on set I was assigned tasks to perform on own until I was able to do all of my assignments myself. There was a lot of learning as you go working as a production assistant because there's a wide range of things you can be asked to do, especially on the show I worked on because so many days were on location.