Question

Just started. Got a really easy question: Are you supposed to do PS1 before lecture 2?

Answer 1

There is a list here of where the assignments fit in:
http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00-introduction-to-computer-science-and-programming-fall-2008/calendar/

Answer 2

Also, I would recommend watching through lecture 4 + doing the readings before trying to tackle ps1. It is possible to do ps1 without watching ahead, but it will make it far easier for you. (I wish I had when I was starting the course).