Learning Git

There are many ways to get started with Git in terms of learning, whether that be a book, tutorial or course, so here are some options.

Introduction
Books
Videos
Reference
Tutorial
Interactive
Training
Tips

There are plenty more useful resources online including things like Pluralsight and Udemy, sometimes development communities also compile lists of helpful resources or techniques and Development/Git For LibreOffice Developers - The Document Foundation Wiki is one helpful example.