Should a beginner start drawivg digital or on paper?

hey i started drawing lately and started out on my school laptop and an digital pen. However many people told me to draw on paper first or read it online but not really why.

whats so different about it except that you dont see the erased lines on the screen like on the paper?

ps: i never really drew before in my life so i dont really know anything except how to draw a halfway straight line so please explain like youre talking to a toddler

thanks in advance