By default, Emacs will only add a second ", ', close parentheses and so on if you enable electric-pair-mode, that is disabled by default. Emacs in a general way

By default, Emacs will only add a second ", ', close parentheses and so on if you enable electric-pair-mode, that is disabled by default. Emacs in a general way by default is very simple, you need to enable everything that you want.