Hey @Ivi,
Welcome to Speckle!
You can have a look at this example as a starting point: Speckle React Starter. It handles authentication smoothly and demonstrates how to use GraphQL queries in a basic manner.
If you are only interested in visualizing Speckle 3D models, you can check out the 3D Viewer documentation and also this basic example: Basic Setup - StackBlitz.
If you can share more about your use case and be more specific, we can help you further.
Are you interested on:
- Authentication?
- 3D model visualization?
- GraphQL query?
- View object parameters?
- or something else?