Git is more than a little intimidating when you’re first getting started. Fortunately my friend Jen Reiher made this excellent flow chart to help you. Also, tell me that URL isn’t awesome :)
The reason I like this flowchart so much is that it’s really clearly broken down into steps and doesn’t drown you in information you don’t need. A lot of git guides start talking about branching and merging right away, and while those are important concepts they’re not necessary if you just want to put a simple project up on github so other people can see your code.