How to create gameobjects by clicking in the scene view in the editor?

So I have been trying all day but still couldn’t get it to work.
I want to be able to create new gameobjects at my mouse position in the scene view by either clicking or pressing a key if that is easier.
Thank you for your help

I discuss exactly that, here:

If that’s something you were looking for, I begin tutorial from 1h 32m 3s