if you are new to git, these sources might help:
- https://git-scm.com/book/en/v2 - number one source, available online, for free, has complete translation to quite a few languages
- https://learngitbranching.js.org/
- https://girliemac.com/blog/2017/12/26/git-purr/
- https://firstaidgit.io/#/
- https://git-scm.com/docs
