I dont like Lizard Litter--I'd suggest something safer like shelfliner or even washed play sand ($5 or less at Home Depot).
What kind of UVB light do you have? If it is a tube then you will also need a basking light. The temp in the basking spot (on the spot not the air) needs to be around 100 or a bit higher. They need heat from above to properly digest their food. A regular household 60 watt bulb should be enough. Buy a digital indoor-outdoor thermometer (around $10) Keeping the temperatures correct are vital to your beardies' health.
A 10 inch beardie needs to get protein (crickets and such) daily. Besides a small amount of fruit their salad should be mostly made from dark leafy veggies like collard, mustard greens and turnip greens). Salad should be offered fresh daily. They will eat more of it as they get older--adults eat 80-90% salad.
DO NOT leave crickets in tank overnight--they will munch on your beardie--and can cause serious damage.
READ some good care sheets
www.beautifuldragons.com has an excellent one
Keep posting your questions... It may seem like some of us will talk harsh at times--but it is only because we care...all of us were first time owners once!
DM