So he isn't eating any pellets probably? It's hard to tell unless you specifically measure them.
You can try making them a little moist by soaking them in some juice so they aren't as crunchy.
He might or might not like them, it's hard to know.
That's a good idea, my dragons didn't like the pellets, but they'll be great food for the crickets. And stick to small crickets for awhile. Large are for when they're about 9-10 months old and onwards. The superworms are fine for him. So you need to check the temps of the basking spot, do you have a temp gun or an Accurite digital temp guage? You need on (the Accurite is very inexpensive & has a probe you put on the basking spot to determine proper temps. Your little guy should be 105F on the basking spot, that can be reduced as he gets older. Here's a really good care sheet to read: https://www.beardeddragon.org/articles/caresheet/. Any questions, just PM me.