So this is a moment of hard truth that you might have to face. Despite the friendly chameleons you've seen in videos online or maybe even seen in a pet store or reptile show, not every cham, panther or otherwise is gonna be totally chill. My panther hated my guts for several months until I got him to feed from tongs that I held very far from my body for the first time.
Just be patient, and absolutely do not force the issue of handling or feeding with your cham or it'll get too stressed.