Handling - I would keep to a minimum or not at all at this point until he becomes more acclimated or comfortable with you.
Feeding - Superworms should be given as a treat and not as a staple feeder. Crickets, while they can be given as a staple feeder, are not the most nutritious of feeder insects and must be gutloaded and supplemented accordingly. As a juvenile, they should be feeding as much as they want. I feed my juvenile a combination of crickets and roach nymphs and he eats around 15 each day.
Supplements- while this is somewhat of a grey area and everyone does things a little differently, you should generally be dusting feeders with calcium at every feeding, calcium with D3 twice a month, and a multivitamin twice a month.
Cage - start looking for a bigger cage soon. He will need a 2x2x4 or something comparable in the next few months.
Lighting - get the linear fixture ASAP. The dome light with the compact UVB bulb Is no good.
Check out the Chameleon Academy Website/Podcast (formerly the Chameleon Breeder Podcast) for lots of good info. Here’s an episode on making the chameleon kit work until you get a better setup.
https://www.chameleonbreeder.com/podcast/132-making-the-chameleon-kit-work/
All of this will help reduce any stress he may be feeling. Getting a cage with a few solid walls can help hold humidity or using a shower curtain in the meantime. Dragon Strand makes some great cages that can help.