Welcome to PA. to be honest, if you want to start knapping..... toss that quartz aside for now. its tough stuff and often had lots of fractures. its a good way to get discouraged fast. if you post in the "trading post" forum or look online you can find some obsidian to start on, its a lt easier to flake and doesnt take as much effort to get an arrowhead out of as quartz. also try knapping glass or toilet tank porcelain to get started. just my suggestion, but avoid texas chert until you have the basics down, only because you'll end up with a bruised leg and busted fingers by the time your done making big rocks into little ones
do yourself a favor and check out flintknapping tips on youtube. but more importantly get yourself a dvd. 3 rivers has some good choices. if you like aboriginal tools. i recommend john McPherson's
breaking rock dvd set.
good luck to you and keep us posted with your progress- Ryan