In your other thread, you asked its sex and were told to look for spurs and again in this thread you were told to look for them. You said you don't see any...so if it's a female you will, in a few months need to put an egg laying bin in the cage and leave it there because female veiled chameleons can lay eggs without having mated. If you don't provide a bin there's a very high chance that she will die eggbound.if you overfeed her once she's becoming mature she will likely produce a big clutch, might develop MBD and might become eggbound.
You said..."What should I do I don’t know if it’s because he is knew and scared because he isn’t eating either"...is it pooping? If it's pooping it's eating. (The white part is urates in case you don't know...the brown part is poop of course.) Are the insects the proper size? Not too big for it?
Are you dusting the insects just before you feed them to the chameleon? Are you feeding the insects properly? Do you have a proper UVB light and proper basking temperature?
You said..."He hasn’t been drinking as much as I try"...
@cleothechameleon told you to mist and set up a dripper...did you do that?