Hi and welcome!

He looks like a pretty healthy little guy. Does he have his eyes closed during the day?
You do need to make some improvements in his enclosure. The best place for accurate and up to date care info is here.
https://chameleonacademy.com/chameleon-basics/
Your guy is going to need a much bigger enclosure…a 2x2x4’ is the minimum for an adult. To help him feel safe, it needs to be elevated as high as reasonably possible. You’ll want to fill it with safe live plants and give him lots of branches and vines to travel on. No substrate on the floor is best (after bioactive) and easiest to keep clean. You want to try to simulate a forest edge and provide him with places to take shade and hide when he wants.
Priority right now is to get a proper uvb source for him. You’ll want to get a linear T5 fixture with either ReptiSun 5.0 or Arcadia 6% uvb bulb. It will need to be long enough to span the width of the enclosure, so 24”. For basking light you can use an incandescent bulb. I’d say 60-75w would be a good place to start for a basking temp of between 82-85f. Then basking area should be at a level where his back is about 8” below your lights.
Second priority is proper supplements. There’s so many different supplements and regimens, but I’ll give the one I like and use. You’ll need to lightly dust all of his feeding with a phosphorus free calcium without vitamin D3. One feeding every other week you’ll instead use Reptivite with D3.
For feeding, you’ll want to be giving him around 3 feeders every other day or 3 days a week. Attaching feeder and gutload graphics for you. Caring for your feeder bugs is important so that they are healthy and provide good nutrition to your chameleon.
Other great sources of info on husbandry can be found at Neptune the chameleon on YouTube. Feel free to ask as many questions as you want.
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