To start using GitHub:

1. Create a free account at github.com.
2. Install Git on your machine (search "install git" for your platform), then tell Git who you are — this name appears on your commits:

git config --global user.name "Your Name"
git config --global user.email "you@example.com"

3. On GitHub, click New repository, give it a name, and create it. GitHub then shows you the exact commands to connect your local project to it.

That's the one-time setup. After this, sharing a project is just a few commands, covered next.