To get set up, you’ll need command line access (Example: Terminal on OSX), and your favourite Text Editor or IDE (we recommend Atom by GitHub). If you’re not comfortable with using git on the command line on a day to day basis, you may want to grab a GUI-based Git client. GitHub Desktop is a good entry point for those new to Git.
Once you’re all set, simply follow the instructions for VVV over on GitHub, and then consider converting your WordPress installation to a Multisite instance. Most documentation from hereon in is based on that configuration.