This sounds like your first type rating.
There are hundreds of thousands of pages of study material floating around, but what you can run into is studying the wrong material. You end up having to unlearn, when you arrive for your training, instead of learning. Each company has procedures, many of which are similar, but not the same as your employer. Have you contacted the employer about study or training materials? Do you know anyone at the employer who can forward some starter things to you?