Hi and welcome to the forums, you have come to the right place for everything chameleons. you will find that there is tons of information on here and the members are great.
I would def let your little guy settle in, its not uncommon for them not to eat for the first week or so. if this is the case might be smart to leave the guy comepletely alone as much as you can, this means even just looking at him, another thing you want to pay attention for is drinking.
just to be on the safe side of things since this is your very first chameleon and its very common to be given misleading/wrong information on care for these pets. i ask if you can fill this out to the best of your ability to we can get you on the right track of things from the get go. being as specific as possible and including pics of set up. if you havent already I suggest a good read of the caresheets link provided on the site over on the left hand side.
Chameleon Info:
Your Chameleon - The species, sex, and age of your chameleon. How long has it been in your care?
Handling - How often do you handle your chameleon?
Feeding - What are you feeding your cham? What amount? What is the schedule? How are you gut-loading your feeders?
Supplements - What brand and type of calcium and vitamin products are you dusting your feeders with and what is the schedule?
Watering - What kind of watering technique do you use? How often and how long to you mist? Do you see your chameleon drinking?
Fecal Description - Briefly note colors and consistency from recent droppings. Has this chameleon ever been tested for parasites?
History - Any previous information about your cham that might be useful to others when trying to help you.
Cage Info:
Cage Type - Describe your cage (Glass, Screen, Combo?) What are the dimensions?
Lighting - What brand, model, and types of lighting are you using? What is your daily lighting schedule?
Temperature - What temp range have you created (cage floor to basking spot)? Lowest overnight temp? How do you measure these temps?
Humidity - What are your humidity levels? How are you creating and maintaining these levels? What do you use to measure humidity?
Plants - Are you using live plants? If so, what kind?
Placement - Where is your cage located? Is it near any fans, air vents, or high traffic areas? At what height is the top of the cage relative to your room floor?
Location - Where are you geographically located?