hi
he looks a little bit like a she - are you sure of the sex? show us pictures of the back of the hind feet if you don't know with certainty.
the dark colour may be a sign of stress. yes, they can take a few days to settle into a new cage.
can you provide a picture that shows the entire cage? it could be you need more plants and branches, places to hide. Or it could be the temperature - you list a single temp but is that the basking temp or the overall ambient?
no red (or any) light at night.
what type of UVB light are you using right now?
you may find a dripper helps with providing drinking water. spray the sides of the cage and plant leaves, spraying top down more than from the side. Spray for at least 3 minutes each time, and as much as 10.
its good that you are going to get a proper cage.
do you offer any type of prey other than crickets and mealworms?
the FLukers stuff isn't very good - and kale should only be used in moderation. You will want to review gutloading on the care sheets.
the care sheet for a veiled chameleon on this site is good -if you follow that you are going to be fine.
any conflicting info you see on the forum will generally be related to nuances, minor differences in technique and will not typically vary a great deal from the care sheet. there are not hard and fast rules, but there are general guidelines that a newbie should follow, and those you can find in the care sheet here:
https://www.chameleonforums.com/care/caresheets/veiled/