Your ig needs to be with his family, in a spot where he can see traffic moving. If you go to the trouble to mount the viv bottom six feet above the floor, he will instinctively feel safer while he watches all this activity in his strange new house.
I can suggest a few ways to do that. If you don't go to the trouble, he might not recover.
Cats and dogs have the typical predator's gaze (both eyes on the front of their heads). You have the same type of gaze. Look away from him when you approach him. If he's staring intently at you, don't meet his gaze for now.
If he keeps nose-bashing, he's headed to a very bad outcome. You have to protect him from the cage walls. I always suggest that people get a 1/2 inch thick backpackers foam pad. It's stiff foam. Line the bottom of the cage walls with six inch high strips of foam. If he jumps above the foam to do bashing, add another six inches. Give him something to climb on so he can see out of the cage.
From his high perch, he can watch the animals and get used to them.
That's a good start. I'm sure you will have further questions.