Hand feeding is not recommended. Many iguanas on this forum through the years have become addicted to hand feeding, which gives them nowhere near the amount of food they need each day. Instead, spear a mouthful (head-sized collard greens plus thin slices of red bell peppers, about one pressed tablespoon) on the end of a sharpened 1/4 by 30 inch stick, put the end in his cage right next to his nose, and wait for 30 seconds. It may or may not work. At least that way he won't associate food with your hand.
I agree with Rose. And I also promote the idea of putting a plateful of aromatic food on the floor of their habitat, so they have to climb down to eat and drink. Your iguana will know the food is there, because he can smell it. because six weeks has gone by, put out two food dishes, one on the floor and one up on his shelf near to him. Even that little bit of exercise involved in climbing makes a large difference in how well gravid iguanas lay their eggs, and I believe any iguana benefits from that bit of exercise. The stair walking is a very good idea.
Your iguana is new to your house, and is having Relocation Stress. They often don't eat or show their personalities during this adjustment period, but a healthy iguana is totally unharmed by refusing to eat even as long a two-plus weeks. By then he should be more relaxed and have started eating normally.
Learn more about your iguana. I think everyone will agree that this is the best source of iguana information for the present time:
Unless you already know all this, I think you will be amazed by it.