i have one, and just like most fish that i have at the start, they hide. they are known for perching, but for the longest time, maybe 2 to 3 weeks, mine had a hiding spot in a small cave, within my macro algae. about a week ago, i found that he has been a bit more adventurous, and sat on top of one of my rocks. last weekend, i added a hammer coral, and as of yesterday, he has become way more adventurous. i found that he has taken a liking to my hammer coral, whether it is perching just underneath it, or actually sitting within it. i also see him move quite a bit more throughout the tank in general, now.
from the start, i never really had any issues feeding. i found that he is fine with feeding on flake food. he is still a little skiddish, so he wont go out into the open to snag something, but if something comes in close proximitty, he goes for it. for a while, i was direct feeding to make sure he got something, but now he comes out enough where i dont have to worry about that too much.
at first, he stayed in the same area, so it was easy to find him, up until recently where i will see him pop up just randomly throughout the tank now.