Question

So this might be a dumb question, maybe right in front of me, but how do I know when to do which assignments, and how do I know when to take the quizes?

Answer 1

there is a calendar on the site http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00-introduction-to-computer-science-and-programming-fall-2008/calendar/
that tells you for which lectures what assignments are due.
it also tells you when the quizzes should be taken.