How to use the common data model?

Hello,

For my internship i am making a sales demo application with the AdventureWorksDB. Now they asked me to use the Common Data Model (CDM) but i have no idea how to use it. I've done some research and downloaded the GitHub files but i have no clue where to start or how to start.

Can anybody provide me with some help or maybe some good tutorials on how to use this model?

Thanks in advance!