This book, "Git & GitHub vol.1", together with its sequels, "Git & GitHub vol.2" and "Git & GitHub vol.3", will help you learn how to handle Git and GitHub, their operations, and how to operate them while creating a single website.
The book is designed to teach how development is done in the field, how Git and GitHub are used in a project, the flow up to commit, the concept of granularity, and how to leave commit messages, etc., assuming practical use. In "Git & GitHub without thinking too hard vol. 1," Git operations are mainly covered.