When you're new, there's an overwhelming amount of information to absorb. You should plan to ask many, many questions, which means it's important to have the right framing of that interaction.
Obligatory Confucious quote:
The man who asks a question is a fool for a minute, the man who does not ask is a fool for life
Myth #1:
Myth #2:
Instead of thinking that building expertise in something is difficult or impossible, realize that you can become more knowledgeable than anyone as long as you narrow the scope appropriately. (e.g. "In one afternoon, I can go understand more about the flags to configure git log compared to anyone on my team of 10 people.")