Head over here to get the prereqs installed - https://www.microsoft.com/net/core#macos

Visual Studio Code is a really terrific editor for the language, and gives great support for macros, extensions etc. Do it :)

Once you're setup, you should have an example project that looks a little bit like:

using System;

namespace ConsoleApplication
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }
}

Note how painfully similar to Java it is? It's basically stolen. I think the only differing line for an equivalent hello world console app is the

Console.WriteLine("Hello World!");

as opposed to a:

System.Out.PrintLn("Hello World!");

in Java.

More to come...