He's super adorable. How is his mobility? All the photos are him lying down :lol: but he's super cute.
His setup looks pretty good, and just as a heads up, that 20g enclosure will need to be upgraded within just a couple months! When you do, I recommend switching out your UV bulb to a ReptiSun 10.0 T5 or an Arcadia 12% T5 bulb. It looks like you're currently using a compact bulb which will slow his growth.
It's also worth noting that the stuff that comes in those starter kits are generally crap, sorry to be blunt. I started with a Nat. Geo 29 gallon beardie kit for my first dragon and basically had to replace everything in the first few months and THEN upgrade the size right after. Basically, everything it came with is no longer used at all. The enclosure was great! ... but not for a dragon.
Be sure his basking spot is a nice and toasty 105F-110F for his growing beardie body! A nice temp along with good UVB will make his appetite healthy, and he should be eating upwards of 30+ appropriately sized crickets a day.
Please do not offer mealworms or superworms, regardless of what the pet store tells you. Other good bugs for them are dubia roaches, silkworms, and black soldier fly larvae for a growing dragon.
I would begin offering small "side salads" already to get him acclimated to veggies. Even if he doesn't really eat them, continue to offer them. Curious babies will still pick at it and some enjoy it! Good staple veggies are collard greens, turnip greens, dandelion greens, mustard greens, green beans, squashes, and bok choy. Shredding into tiny pieces and putting them in the middle of the enclosure floor encourages them to check it out and nip at it.
I know this was a lot of information but I hope it's helpful!
Keep us posted on his life with you