Repair.org: You bought it, you should own it. Period.

iFixit.com: Source of repair guides, tools, and forums.

MacOS Apple Support: How to download current or previous MacOS versions.

https://support.apple.com/guide/mac-help/erase-your-mac-mchl7676b710/mac: Erase your Mac and reset it to factory settings.

Louis Rossman on YouTube: Videos about Right to Repair and repairing MacBooks.