Click on Start now.
Select a starter template from the list. You can also type in the textbox to search for the language/framework that you want to work on.
On clicking on one of the templates, a new project will be created and a new project instance will be started.
Wait for the project instance to be started and connected.
Once connected you will see the Project Workspace.
If the project has autorun enabled the code will run automatically.
You can now create files, write code, run commands in the terminal, and preview a running server.