The final image is only one part of a project. Why it exists, the choices made along the way and which experiments worked are worth recording, too.
Explain the problem first
A project introduction can begin with a specific question: why make it, and who could it help? A clear starting point makes the choices that follow easier to understand.
Keep the decisions that matter
A record does not need to cover every step. Choose a few decisions that shaped the result, explain what you considered and what you selected, and describe what changed because of it.
A lesson can start the next attempt
After finishing a project, write down what it does today and what you still want to improve. That reflection can provide clues for the next thing you make.
The project notes here will follow that thread: question, choice, result and lesson. Share the result, and the thinking behind it.