I wrote a book on Git, that would help beginners get started with Git over a weekend. You can read a free chapter here - https://www.sitepoint.com/git-branching/

You can find the book here - https://www.sitepoint.com/premium/books/jump-start-git (You may access the book through a free 14 day trial here: https://www.sitepoint.com/premium/products/Z2lkOi8vbGVhcm5hYmxlL1Byb2R1Y3QvMg)

I would request you to go through the sample chapter and let me know what you think. Thanks!