Let him adapt at him own pace. If he feels rushed, he feels threatened.

Work on him adapting to you first; leave intros to other pets for later.

Food is your friend. Feeding times should be routine. After a few feedings, show up a little bit late; maybe 10 minutes. Try offering food from your hand.

Toys and play time are good too. I liked the idea of a soft toy for him to cuddle with. And maybe a towel or such with your scent on it.

He HAS lived in a home, just not yours. So the transition won't be a long or difficult as for a feral. Good Luck!