Are there any open source projects that are representing all features, like an admin panel with an API? As someone coming from Java and Rails, I can learn it with just reading the code.
https://docs.microsoft.com/en-us/aspnet/core/?view=aspnetcor...
https://docs.microsoft.com/en-us/aspnet/tutorials
Both of which provide more depth than just "Hello World".
And some free trainings where you can create as many classes as you wish.