Sure you can hold him. He will be stressed for a few days so I would just hold him for a few minutes a couple times a day. You will see his stress marks under his chin and belly when they turn grey or blackish color.
Just baby talk to him while you hold him.
You could give him a bath tomorrow in a inch of water if he's just a baby. Make it as warm as you would for a newborn baby. This will help hydrate him. Have you put up pictures yet?