Update README.md (#36)

* Update README.md

* fix: update README link

* feat: add caution section

* fix: bring back info about Hermes

Author: okwasniewski

README.md

@@ -11,14 +11,39 @@
 
 React Native Vision OS allows you to write visionOS with full support for platform SDK. This is a full fork of the main repository with changes needed to support visionOS.
 
-This project is still at an early stage of development and is not ready for production use.
+> [!CAUTION]
+> This project is still at an early stage of development and is not ready for production use.
 
-## Contributing
+## New project creation
+
+1. Make sure you have a [proper development environment setup](https://reactnative.dev/docs/environment-setup)
+2. Download the latest Xcode beta [here](https://developer.apple.com/xcode/).
+3. Install visionOS Simulator runtime.
+4. Initialize the project using this command:
+
+```
+npx @callstack/react-native-visionos@latest init YourApp
+```
+5. Next, go to `YourApp/visionos` folder and run following commands to install Pods:
+
+```
+cd visionos
+bundle install
+bundle exec pod install
+```
+
+6. If you want to use Hermes, you need to install CMake from source (v3.28.0)
 
-1. Download latest Xcode beta [here](https://developer.apple.com/xcode/).
-2. Install visionOS Simulator runtime. 
-3. (Optional) Using Hermes - Install latest version of CMake (3.28) from `main` branch: 
 ```sh
 brew install cmake --HEAD
 ```
-4. Follow the same steps as for running iOS defined in [packages/rn-tester/README.md](./packages/rn-tester/README.md)
+
+If not, remember to disable it in `Podfile`.
+
+8. Open `YourApp/visionos/YourApp.xcworkspace` using Xcode 15 Beta.
+9. Build the app by clicking the "Run" button in Xcode.
+
+## Contributing
+
+1. Follow the same steps as in the `New project creation` section.
+2. Checkout `rn-tester` [README.md](./packages/rn-tester/README.md) to build React Native from source.