dont give up with most ew chameleons it can take up to like 3-5 mins of just holding it still but sooner of later he/she will realize you not a threat and you have food and take it out of your hand. I find mine like supers out of the hand the most because they move around in between you fingers alot.
Stand there completely still with a bug between your fingers, try and line your body up with your arm.
It my take time especially if you just got your chameleon