Update README.md

Author: inkade

README.md

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 This repository contains the Teamleader API Definition in [API Blueprint](https://apiblueprint.org/) format.
 
-## Published documentation
+## Documentation
 
-Our latest API definition is automatically published on [developer.focus.teamleader.eu](https://developer.focus.teamleader.eu).
+For detailed documentation and usage instructions, please visit our [API documentation website](https://developer.focus.teamleader.eu), which provides comprehensive information about the API endpoints, authentication, request/response formats, and more.
+
+## Get Started
+To get started with the Teamleader API, follow these steps:
+
+1. Visit the [API documentation website](https://developer.focus.teamleader.eu) to access the API documentation and familiarize yourself with the available endpoints and functionality.
+
+1. Obtain your API credentials by signing up for a [Teamleader account](https://signup.focus.teamleader.eu/) and generating an API key. You'll need these credentials to authenticate your API requests.
+
+1. Choose your preferred programming language and framework for making API requests. You can use any HTTP client library that supports the language of your choice.
+
+1. Refer to the API documentation for detailed examples and code snippets on how to authenticate your requests, make API calls, handle responses, and interpret error codes.
+
+If you have any questions or need assistance while integrating with the Teamleader API, don't hesitate to reach out to our support team or refer to our documentation for further guidance.
 
 ## Contributing
 
-Please see [CONTRIBUTING](CONTRIBUTING.md) for details.
+We appreciate your interest in contributing to the Teamleader API. If you'd like to contribute to the development of this API definition, please read our [CONTRIBUTING](CONTRIBUTING.md) guidelines for details. It provides essential information on how to contribute, the development process, and guidelines for submitting pull requests.