Congratulations! If you’ve gotten this far, you’re ready to start developing your own Flink applications.
Where to go next:
The DataStream API Code Walkthrough is a step-by-step tutorial that describes how to create a complete streaming application from scratch.
You should also explore Flink’s relational APIs, which are a convenient way to create Flink applications without writing any Java or Scala code. You can start with the Table API Code Walkthrough and then continue your learning with the Apache Flink® SQL Training.
Last but not least, Stateful Functions is a powerful new library similar in spirit to serverless computing, but intended for state-centric problems.
And before you put your first application into production, be sure to review the Production Readiness Checklist!