It was a great experience learning RAP. SAP help document helped me a lot. Stick to Concept section in the document, and this will help us navigating tough waters.
Below Repo from Git will explain the project and use case. I have included the high level Architecture of the business case. Kindly go through the README.md file for more details.
Draft Scenario : https://github.com/vishnucta/legorapdraft
Non-Draft Scenario : https://github.com/vishnucta/legorap
Happy Coding 🙂