Community Novice

How are you using canvas for differentiated assignments/quizzes?

When I used edmodo, I found it really simple to do this -- now, in canvas, I feel like a blockhead.  What am I missing?  Do I really have to recreate each item from scratch?  Do I really have to select each individual person for each assignment (is there honestly no way to choose "everyone except" or to excuse a student from an assignment/quiz in a way that prevents them from accessing it?)

ELI5, please!