Try wiggling some half cut grapes near his face ,i had the same problem but eventually he started liking fruits and even vegetables! Just takes time also i recomed puting small fruit in his feeder so tat he thinks it aan insect . Good luck :)
My chamelon always seem to be in a very good mood when ever i open his cage he leaps on to my arm.had feedinng works best! He will have trust in u to hold him but dknt think holding chamelons everyday is normal you also have to give them there space so that they dont become stressed:p