Obtain the Starter Aircraft

Help me plan my first Git repository transfer using the public Academy repository `https://github.com/BillHood/KnowCode-Academy-BasicWebSite`.

Before planning, ask me for my GitHub username. Instruct me to reply on one plain-text line beginning `GITHUB_USERNAME=`. Restate the username after I reply and wait for my confirmation.

Do not change files, create repositories, clone anything, or run a mutating command yet. Explain fork, clone, branch, commit, and push in plain language using this specific repository. Show which copy will belong to the Academy, which copy will belong to me on GitHub, and which copy will live on my computer. Explain why Download ZIP is not sufficient for the complete mission.

Verify only the non-sensitive local Git configuration and GitHub authentication state needed for this transfer. Do not display or request passwords, tokens, cookies, recovery codes, SSH private keys, or authentication codes. Identify every human approval checkpoint and finish with the next single action I should take in the GitHub interface.