You need a minimum of 3ft x 18" x 18". I have a 4x2x2ft tank for my female, but if young, this may induce stress on the smaller beardie. You need to provide something for it to climb on and provide a heat spot of 95f with a gradient of 80-90f. You need both UVA and UVB lighting on a 12 hour cycle.
Use newspaper as substrate to start (to monitor those stools for parasites) and move onto something else like playsand (no debate here pls people!!!

) when it gets older and not so much of a sloppy hunter.
Supplement with calcium and/or vitamins whilst it grows up and gut load your crickets/locusts with catfood. It's a good way to get the required nutrients into your Beardie.
Hope this helps.