Just start off with a baby and grow up with them. I recomend a petsmart or petco beardie because they are the ones who really need the saving. They come very young these days. Petsmart says oh they are 2 months old. Id be surprised if they were older than 2 weeks. My petsmart beardie is amazing and i love him. Just like all animals theres just that connection between you and your beardie if gotten while young and being its first owner. Its good to learn with your beardie and with this site it is very possible to raise one from under a month. I cant tell you how many times i came on here with dumb questions but everyone answerd them anyways. Get a baby. Before you get one though have its vivarium set up and have someone on here run you through it to make sure you got everything you need. With a baby IMO its good to keep them in a small viv untill around 4-5in. Like a 10 gallon. Or in the viv your going to have him in but with a divvider. When that young they have a problem finding crickets in bigger cages, and you can have a hard time finding him. Heres a few basics.
10.0 Reptisun UVB tube or 12% arcadia uvb tube are the most recomended UVB sources. Alot of others can cause eye problems.
Basking temp of 100-110 (for babies, more near 110) Regular house bulbs will do fine you do not need special reptile ones, as long as you get require temps.
Cool side of 70-80
No coil bulbs
No night bulb, if night heat is needed use a ceramic heat emitter.
40long is the is the minimum recomended aquarium. 55gallon is ...ok but little narrow.