add more test instructions

Author: ppandit-sfdc

FOR_CONTRIBUTORS.md

@@ -29,9 +29,27 @@ See the [Prerequisites section in README.md](./README.md#prerequisites) for comp
 
 3. **Verify installation**
    ```bash
-   poetry run datacustomcode version
+   datacustomcode version
    ```
 
+4. **Initialize a project for development work**
+   
+   **Note**: To test your changes and develop new features, initialize a sample project:
+   
+   ```bash
+   # Create a new directory for your test project
+   mkdir my-test-project
+   cd my-test-project
+   
+   # Initialize a new Data Cloud custom code project
+   datacustomcode init .
+   
+   # Test your SDK modifications against the sample project with: 
+   datacustomcode run ./payload/entrypoint.py
+   ```
+   
+   **Tip**: See the [README.md](./README.md) for additional `datacustomcode` commands (`scan`, `deploy`, `zip`) to test specific code paths and validate your SDK changes thoroughly.
+
 ## 🔧 Makefile Commands
 
 The project includes a comprehensive Makefile for common development tasks: