I was trying to learn git and after searching a bit, I finally found some good open-source tutorials. Specifically, I followed those two tutorials, in this order:

1. https://ohmygit.org/ (a computer application)
2. https://learngitbranching.js.org/ (a website)

The second seems to cover a bit more advanced topics (it teaches more thoroughly about remote repositories)

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Also after an alternativeto search, I found two more open-source resources:

1. https://github.com/vishal2376/git-coach (an android application covering the very very basics)
2. https://github.com/jlord/git-it-electron (An old computer application)

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PS. Prior to these I had a basic git course, which I think wasn’t enough, but probably helped me either way and after this I had checked some git resources, which gave more of a rounded knowledge about git and I think are worth metnioning:

1. https://jdsalaro.com/tutorial/git/index.html (this person is here on lemmy too)
2. https://tom.preston-werner.com/2009/05/19/the-git-parable.html
3. https://missing.csail.mit.edu/
4. https://docs.codeberg.org/git/clone-commit-via-cli/
5. https://github.com/SimonSchubert/LinuxCommandLibrary

Lastly, there’s the pro git book as well for anyone who wants to go even deeper: https://git-scm.com/book/en/v2