Here are a couple resources for getting started with AWS CodeBuild:
1) Complete this getting started with AWS CodeBuild guide for a basic introduction.
2) Test and debug your build with CodeBuild Local
3) Learn how to set up a continuous integration workflow with CodeBuild and AWS CodePipeline by visiting this guide.
Other getting started resources
Overview videos
Continuous Integration Best Practices (47:53)
Slalom: CI/CD for Serverless Applications on AWS (11:04)
Setting up CI/CD for containers (6:16)
Learn more about AWS CodeBuild