I 3rd the motion in that a 10 gal is way too small. you'll want to start with a 20G long and in a few months you'll have to upgrade to at least a 55G new home. I will also tell you based on personal experience that you'll want to mix the diet WHILE HE'S A JUVENILE!!! Crickets are great beginning live feed but I would also suggest adding greens to the diet. A lot of breeders and pet shops feed their beardies greens and then when they get a new home they're switched to crickets, the problem with this practice is that beardies are very leary of new foods and typically must be offered several times before they'll try it. I thought i was doing the right thing with my beardies at first by feeding dusted crickets but, after a visit to my vet we discovered that the crickets caused an impaction and he was given an enema to relieve the pressure(good times!). So the lesson learned in all this rhetoric is to try something new (AND SMALL!!!).
P.S.---Good rule of thumb, feed nothing larger than the area between the eyes!
Hope this helps,
-Harry