I want to learn 2D game programming. But, I am confused!

I want to make a 2D game in C#. I have begun learning C# on my own. But, I am confused sbout what to learn after c# to make a game. I hear many things like XNA, MDX, Monogame, SlimDX, SharpDX, Frameworks, game engines, IDE's etc. To me all of this has caused a great confusion. The C# game tutorial I am learning is based on MDX (Managed DirectX). Now, I realise that MDX and XNA is dead. I am confused if I want to change my tutorial itself. Can anyone clear things out for me and tell what i need to learn step by step? Please help!