Comment by h-

The best book on Lean for beginners is “2 Second Lean” by Paul Akers. You can buy the book or get it free directly from Paul Akers’ website. https://paulakers.net/books/2-second-lean

Mr. Akers also has several hundred videos about Lean on his YouTube channel. https://paulakers.net/lean-videos

And for an impressive display of what Lean can do, watch this video “Lean Manufacturing - Kaizen Methodology - Lean FastCap Style” https://www.youtube.com/watch?v=su9CulCZTBg