The hard knowledge is QRH, memory items, Ops A and B and frequently (and not so frequently) encountered issues such as resets, go arounds, adverse weather, tech log management.
The soft knowledge is CRM, dealing with difficult days, people (crew and SLF), less than capable ground handlers, having a sense of what ACTUALLY matters to be safe and get the job done.
You'll probably be well up on all in the first paragraph. You'll finish studying the second one on the day you retire!