Hi there ! I replied on your intro thread, pics will help determine a lot about his diet because a lot will depend on his size. Some dragons are huge at 6 months, others are still quite small. Normally you'd feed him 2-3 X a day but it's not set in stone. I raised beardies for many years and there's a lot of leeway once they're past the 13" mark.
Crickets, roaches bsfl are all good staples, mealworms not so much [ just a few per day at most ] Superworms in small amounts once they're past 12-13 " [ smaller superworms ] Crickets + roaches should be no longer than the space between a dragon's eyes + can be fed twice a day, pretty much as many as the dragon wants to eat in a 5 minute time period. Greens like turnip, mustard, collard , kale , endive, dandelion. green leaf clover can be fed any time in any amount, some dragons love them, some eat just a few bites.
Post some pics of Thorny [ full body ] to show his size and also his entire tank + set up. What type of lights are you using ? That's very important too.