Don't be afraid to ask around on the forum. "Newbie" questions are always welcome! Usually people will answer your questions directly, or point you in the right direction. Once you get a little more involved and start a journal for your tank (if you don't already have one), i'd be more than happy to send you some plants!
Amazon swords tend to be pretty hardy plants, so that shouldn't be a problem. Although i've never had dwarf hairgrass, i constantly hear that it doesn't do well in a "low-tech" setup (no pressurized co2). I'm not sure what your setup is like though.