Definitally try to go through a breeder, ask about the parents their history, size and health, lean towards larger dragons, not the small colorful ones, (big ones can be colorful too, just alot of small colorful dragons attract people and are not so healthy), and if you can, look into adenovirus, its something to know about when it comes to beardies.

Its hard to get natural, ive heard of a loam/clay/sand mix, but its hard to acheive really, I use tile, love it, i have ceramic thats sand colored, and now this earth tone one, both bumpy, uneaven and all unique. Many do 1/2 sand 1/2 tile for an adult, its safe to feed salad and have a water bowl on the tile side, but still have some digging room. A good compramise IMO, and if my dragon ever stops being so licky i may add some just to be safe as she is a female. Anyway, ive never actually seen a true naturalistic enclosure for any reptile, a bunch that look natural but dont to a good job of mimicing the habitat, it would be hard in any case. but i havent figured out the clay thing, sorry.

Anyway, a dragon is a great choice for yourself too, just remember they cant be housed together, so 2 means 2 enclosures. But they are a ton of fun, and really great.