Looking to learn C#?

Try these following resources:

https://csharpplayersguide.com/

For a game dev-oriented approach, should get your mindset into the coding arena.

https://learn.microsoft.com/en-us/dotnet/csharp/tour-of-csharp/tutorials/

Tutorials in C# [Interactive]

https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/

To understand the concepts in C#.

https://www.w3schools.com/cs/index.php

The usual recommendation.

https://ineasysteps.com/products-page/c-sharp-programming-in-easy-steps-3rd-edition/

And I can recommend this book if you want to whizz through the basics.

For https://csharpplayersguide.com/, Ask @rbwhitaker on the MonoGame Discord for access to the Discords, his book is really good, I have read it page by page, and the community he has around it is also really good.