From my understanding most people dust with plain calcium everyday and then d3 every week or two weeks alternating with multi v at a young age then as they get older maybe start to lengthen the time between dosage.
And that lights to hot u just need a regular light bulb 60 watt and put a little thermometer to test the heat you' be better off reading chameleon care sheets
The best thing you can do is fill out the how to ask for help form and you will have people who will tell you exactly what you should add or remove from your set up
They turn dark usually when they are uncomfortable but it' expected after what has happened regardless you should be researching the chameleon care sheet
It' that little bump on heel in first picture there's so many thing you need to research to properly care for it before you tame it you can start by feeding it with a cup in your hand then just your hand and get him to come towards you they need so many things or will be better off left outside...