Personally, I would start with something that had less care requirements. Bearded Dragons need a varied diet (fruits, veggies and animal protein), vitamin supplements, UVB... all that can be a bit much for a beginner and if something goes wrong, it can be greatly discouraging.
I would suggest something like an Ackie (
Varanus acanthurus). They don't get huge, have great personalities, are carnivores only and do not require UVB. Granted, they are more expensive in the beginning... but with a Bearded Dragon you'd be replacing the UVB every 6 months and that begins to add up. If you have any questions, feel free to ask.
