The New York Times published an interesting article on some of the challenges the Census Bureau faces in making sure that every resident gets counted. This is quite a task in New York City and I would imagine it can be a tough place to be an enumerator, especially if you have to walk up several flights of stairs! At any rate, it is a nice overview of how the Bureau operates. Might give you an idea if this job is really for you!
Also, I just wanted to mention that there are definitely areas that are doing testing throughout the month of March, so if you still haven’t scheduled a date to take the census test, it probably isn’t too late!