Hi there,

the best thing to do to reduce stress is too leave him alone for now. He certainly won't starve if he doesn't eat for a few days and attempting to force him to eat will only increase his stress. The best thing to do is keep good husbandry in a calm and quiet area and allow him to explore his surroundings at his own pace.

Also mealworms are not the best option in terms of food. Recommend crickets, dubias and earthworms/nightcrawlers