I've been doing finish carpentry for fifteen years and my hands shake now when I try to do detail work and I haven't told anyone because I'm afraid they'll think I'm done.
More people experience this than they realize.
Your hands are starting to shake and you're hiding it, afraid people will think you're finished.
“Where Are You with Trades — Carpentry & Woodworking?”
If this sounds familiar, the Library can help you find the bigger picture.