Hi there!
Yay, you're getting a beardie
!! Do not leave the crickets inside the cage, there have been plenty of cases where crickets have chewed on the beardies limbs while it sleeps. Mealworms, even small ones, are not acceptable to feed to yours. They have a exo skeleton that is hard for them to digest. Crickets are a great option, although there are also Dubia roaches (lots of protein) and Phoenix worms (soldier fly larvae; a good amount of calcium). It all depends on your beardie when it comes to where to feed. When mine was only a baby, I tried feeding her in a separate container and she got stressed out and wouldn't eat. So, I just feed her in her enclosure, and which is perfectly fine
. You should feed the bearded dragon 2-3 times a day, preferably 3, however many they want within 10-15 minutes. The bugs should be no longer than the space between their eyes. They should also be dusted with calcium approx. 5 times a week/every other day. You should also offer a small salad consisting of greens usually just once a day and leave it available (collars, mustard, dandelion, NO LETTUCE OR KALE). As well as veggies (Acorn squash, bell pepper, green beans, etc.) and the occasional piece of fruit (banana, strawberry, apple). Single baby's are young, they may not want to eat the salad, just keep offering and they may get interested. Anyway, sorry for the long reply! Good luck!