Want to start playing immediately on Mac or Windows?
Check out Getting Started with Blink1Control.
Are you a server admin or operate a headless computer?
Check out Using the blink1-tool commandline program.
Are you a developer and want to learn about available libraries and SDKs?
Check out the SDKs & Libraries page.
Are you an Raspberry Pi / Beaglebone user / embedded Linux user?
Check out the compiling blink1-tool page.
Because blink(1) works on so many different operating systems and has many different uses, getting started depends on your intended use.