I'd gladly add another concept: how to quickly navigate into unknown territory. Experts might not know everything, but they can analyze a new situation quickly due to accumulation of concepts and overcoming new situations over the years.

ps: and ultimately, when I compare my younger self to me right now (in music) .. the only difference, is a subtle blend of patience and sensitivity. When you don't know you try small things without waiting too long or digging too deep. A newcomer may often go paralysed or stuck on the wrong intuition.