Learn to program in C# and XAML with Xamarin.Forms. After you install Visual Studio 2019 you can pair with your mac (if you plan on using a mac). You will start off writing simple example C# Xamarian.Forms Pages to learn the basics, next you will write some Xamarian.Forms Pages in XAML, and then you will create projects that use a mixture of C# and XAML, and finally you will write a platform specific app.