Keeping track of changes in your code & assets is a crucial part of game development - and keeping your data in a safe place is just as important. And as soon as you start working with a team, keeping everything synchronized between people is unavoidable. So, getting to know the tools virtually everyone uses is a good first step.
Thanks to the great folks at freecodecamp there is now a crash course for Git and GitHub. It’s about an hour long and seems to cover a good chunk of information: