I can take the boat out and bring her back through ordinary water without a second thought now. But the tricky passages, the ones with hidden shoals and shifting currents, still get my heart pounding. Last week I second-guessed a turn near the rocks and felt how much I still don't know.
More people experience this than they realize.
You can handle normal waters but the hard passages still rattle you.
If this sounds familiar, the Library can help you find the bigger picture.