As I recall, the interns were given a 30-minute intro to what the organization did, where to file shit, and what things you're not supposed to ask domestic violence victims. Everything else was, theoretically, in a giant binder they gave us. I never heard from the woman that gave that lecture at any point in the next 10 weeks.
There wasn't a lot of training necessary because most of the job was helping barely English-literate green card holders and illegal immigrants to fill out basic forms. Not that they really gave a fuck. I mean, more power to the noble doing good work when most of us will undoubtedly make the world a worse place, but everyone peaced out at like 4:30 and were basically done working by 3.
But if you don't get a 1L SA (and you probably won't), you might as well get one of these DGAF jobs. If one of the 200+ mass mails I had sent during that job wound up being the job I relied on, I would've forever thanked my lucky stars to not be whatever it is the strivers do.
ETA: Worth mentioning: Regular practice was to just outright make shit up to fit within guidelines. If you had to arrive before Date X to keep your food stamps for example, the attorney would say something like "If you arrived before Date X, you're eligible for food stamps. Now what date did you arrive smuggled in the back of a truck?" The ones whose English was better usually caught on. If their English wasn't so good, then sometimes they'd say "after Date X" and the attorney would make a second attempt, saying "Now I want to be clear--on this form that we're filing, I am going to type the date you tell me you arrived in the U.S. If that date is before Date X, you will get to keep your food stamps. If it's after Date X, you will not be eligible for food stamps. Now Mrs. Client, can you tell me, what date did you arrive in the U.S.?"