With AS9100 there is no particular order to take training to become an AS9100 auditor. In fact, most auditing that is available (such as an AS9100 internal auditor course or AS9100 lead auditor course) will cover both the standard as well as how to audit in one course and there is no further information required to become an AS9100 auditor.
You can learn a bit more on auditing in the AS9100 standard in the article:
Mark, thank you very much for your reply. I really appreciate it. Sometimes it is a challenge trying to find a good starting point. I will dig a little bit more before committing to a particular training course.