Serious note. I am working on a knowledge transfer project - 15 years of it.
Work journals are worth it. This has saved me so much time.
Decide on a structure - Obsidian. Bear. Markdown. Notepad++, audio recordings. Whatever the medium and pattern, just stick with it.
Sometimes I would get annoyed, and just write curse words and include screenshots and titles like "Zendesk Primrose Hell", but in the end, all of it was useful.