Second RockAuto; love them. Google RockAuto discount code (enter it in the "how did you hear about us?" box) and get another 5% off.
I'm in Cambridge, MA and willing to walk you through this at my house (I have all the tools you could possibly need), but only if the schedule works out. Unfortunately, you don't have the parts in hand yet, so if you chase the parts at a local parts store, and can come by Cambridge, I can oversee you doing this at my place tomorrow morning or maybe Monday morning. I'm pretty tied up the following two weekends, but might be able to work you in on the Thurday evening the 21st. (I'm not a repair shop, just a regular DIYer.)
IMO, this is the ideal "first DIY job" on a car, because you mostly can't screw it up without realizing you screwed up. Try it without buying $100 worth of tools, unless you have other uses for those tools.
BTW, the "have to brake really easy" might indicate another problem. If the car stops but just makes noise and/or shudders, that's fine. If the brakes literally don't work unless you push gently, that car is not roadworthy and should be towed to a qualified place to repair it. Mustachianism is about life, not taking crazy Fred Flintstone risks. :)