When it comes to feeding, make sure you gutload, if you don't know what that is, look up "gutloading feeder insects" with google.
Also, use as many different feeder insects as you can, and do a little research before you try each one, sometimes chameleons are picky so don't be surprised if he doesn't like some.
Only use mealworms or superworms as a treat, they can cause impaction if you feed them in large quantities which can kill your chameleon.
A wonderful resource to look into is the Chameleon Breeder Podcast, at chameleonbreeder.com. I listen to it in the car, I just downloaded a podcast app on my phone and then downloaded all the episodes and they ares saved to my phone!
Good luck!