You can start learning C# first.
C# Tutorial
I will explain why you should learn C#.
- Best for web-development using .NET Core as it is fastest.
- Best for Game development using Unity
- Easy to learn
You should learn HTML, CSS, jQuery, Javascript for web-development.
You can also browser articles on asp .net on https://qawithexperts.com
If you want to go into Machine learning, start with Python.
If you want to go for Android app, start with Java
Thanks