Quarterly taxes? Help!

I was preparing to do my quarterly taxes for the first time, but after doing some research, I'm not sure that I need to. I've only earned about $1,000 through freelance editing this year, so it sounds like I don't need to pay estimated taxes. Is this true, and if so, does that mean that I only need to pay taxes (i.e., self-employment income taxes) at the end of the year? Please help me understand which taxes I need to pay (and whether they're quarterly or not). Thanks!!!