Like hdochow said the lights are the most critical aspect of keeping them, and keeping them healthy. No matter what anyone at a pet store tells you, you can not be successful with the miniature coil/compact uvb bulbs. The Arcadia pro t5 12% desert is a great light, the ZooMed t5 are good also.
For heat any clear white incandescent or halogen will work. For babies and juveniles you need 105 to 110 basking temps sub adults 100 to 105 and adults 95 to 100.
The temps need to be taken with a digital probe thermometer. They are inexpensive and accurate.
Morphmarket.com is a good place to look for a beardie.
My new girl came from Bourbon City Exotics (can be found on Morphmarket.com) she is fantastic. Kevin dunn sells there also, his beardies are stellar. Drangons den herpetculture is his site.
There is a lot of good breeders out there to that don't necessarily list on Morphmarket.
Of you can find local breeders to where you live, you have the advantage of neetingvthe dragons before you pick one. Their personalities are very wide ranging and finding just the right one is an amazing experience. That's more likely if you can meet them before you buy.
Anyway good luck finding your beardie abd feel free to post pics when you do
Oh and don't hesitate to ask about anything at all.