1. Go to manage apps and create a new App
   
2. Enter a name and choose either Raw App, or use an existing Template
   
3. When choosing Raw App you will need to create a new view "Default"
   
4. Place your new app in dnn
   
5. You should see a placeholder text like "Put your content here"
6. Go to the app folder
   C:\Projects\[Path-To-Website]\Portals\0\2sxc\[Your App Name]
7. Initialize a new git repo
   
8. commit your first work with "initial commit"

In general, always remember to regularly re-commit your work and include the app-data (containing the schema, settings etc. in the app)