Vertex AI API Learning Session

"I need to learn how to create a Gemini Agent programmatically using ADK Vertex AI API, deploy the agent, and then integrate it with a Spring Boot application by invoking the agent through its endpoint/API.

Very simple gemini agent I want to create just for learning purpose so that I can create agent by myself.

I know how to call Gemini model using vertex API that I have implemented many times using Spring Boot project but agent I have not created and deployed and called yet. I need one hour practice session on this only showing me to create and deploy and access that agent using Spring Boot Project.