The first step in an apprenticeship is to find a master worth studying. When you find such a person, consume as much of their work as possible. Read everything they’ve written, watch everything they do, and buy whatever they might be selling. Your goal is to familiarize yourself with their work.
The way you establish your authority in a certain field is by mastering the techniques of those who are already authorities. And what eventually emerges over time is your own style.
The best artists steal, but they do so elegantly, borrowing ideas from many sources and arranging them in new and interesting ways. You have to know your craft so well that you can build on the work of your predecessors, adding to the body of existing work.