Navigate to oak.itl.gwu.edu/login to get started with Wakari.
Once you've logged in, you should go into the settings menu, and under "account settings" change your password from the default one, to something more convenient from you. As soon as you save your settings, return to your user page and open up the JITCode project. Once in the project, you will have the option to open up an iPython notebook, viewer, or terminal, among others. Click the iPython notebook option and then click the first lesson to get started.