The thing about being an expert in an area is that you tend to forget that other people aren't as well-versed as you are.
This can lead you to start at too high a level when showing others what to do, either because you think they already know "the basics" or it just doesn't occur to you that they don't have the foundational knowledge that you do.
Whichever tends to be the case for you, there are people who want to learn what you know.
From "the basics" up.