Change application icon windows Visual Studio

Hi, i want to change the application icon to make it more like a finished product.

This is what i want to change:Captura de pantalla (3)

And this:

I tried this metods: metod 1 metod 2, but on both i got errors and they didn`t work. How can i do it?
Im on windows 10 and i use visual studio 2019

I found out how to change the application icon folowing this tutorial:

now all thats left is the window icon