Xamarin - Visual Studio on Mac

https://docs.microsoft.com/en-us/visualstudio/mac/installation

https://docs.microsoft.com/en-us/visualstudio/mac/

https://docs.microsoft.com/en-us/xamarin/

https://docs.microsoft.com/en-us/xamarin/tools/live-player/index


Xamarin University: https://university.xamarin.com/classes


Xamarin.iOS - https://docs.microsoft.com/en-gb/xamarin/ios/

Above link includes a "Getting Started" section that has "Hello, iOS"(QuickStart & DeepDive) - https://docs.microsoft.com/en-gb/xamarin/ios/get-started/hello-ios/

Xamarin Sample Projects - https://www.xamarin.com/prebuilt

Comparison with other technologies - https://www.altexsoft.com/blog/mobile/pros-and-cons-of-xamarin-vs-native/

Xamarin Forms - https://docs.microsoft.com/en-us/xamarin/xamarin-forms/xaml/xaml-basics/