A business plan is a decision-making tool, not a document for a drawer. The one-page format forces clarity: if you can't fit it on one page, you don't understand it yet.
The canvas has nine blocks: Problem, Customer Segments, Unique Value Proposition, Solution, Channels, Revenue Streams, Cost Structure, Key Metrics, and Unfair Advantage.
Fill it in pencil. Revise weekly for the first 90 days. The plan that matters is the one that reflects what you've learned, not what you guessed.