Wrote a book
I've written 3 opensource eBooks 🙌
https://devdojo.com/bobbyiliev/opensource-introduction-to-sql-ebook
https://devdojo.com/bobbyiliev/open-source-introduction-to-bash-scripting-ebook-guide
https://devdojo.com/bobbyiliev/open-source-introduction-to-git-and-github-ebook