I have also owned Green Iguanas. They are not an animal you can "hide." They need not only natrual sunlight or they will die of bone disease, but they need heat rocks, a heat and UV sun lamp, a machine that creates a VERY humid environment, liquid Vitamin B3, and a host of other medications.
They are used to living in tropical area. That means if they don't get enough sunlight they will DIE. You can't put a blanket over their housing, because the heat will build up and that will kill them. Iguanas need to be kept at a constant temperature and that is high at least 86 tp 95 degrees. If it is a female, you have to make sure they lay even their unfertilized eggs, or they need surgery to remove them. This is a procedure which costs about $1,000.00 in our area, if the eggs are left in the Inguana she will die.
They also get a condition called "Sunlight Aggression." Our female Iguana was very tame, but in the spring when she was making eggs and the sun was stronger, she would run around her cage and vocalize and bite anyone who even tried to feed her. We had to buy special protective gloves to be able to feed her during her Sunlight Aggression Period. Then, she didn't lay her eggs, so they had to be removed, at a great cost to us. We were able to afford it then, and I would say we spent about $5,000.00 over the life of that Iguana. Sadly, we KNEW what we were doing and she still contracted Metabolic Bone Disease, (even with lots of natural sunlight, liquid "sunshine" (about $35.00 a bottle) liquid Vitamin B3, extra calcium, two sunlamps (at a cost of about $200.00, 10 years ago) and was also allowed to run around the house when she wasn't aggressive.
She had to be taken to the vet to have her nails cut, because it has to be done properly or they will get hurt. (About $100.00 a session, about 3 times a year.) She loved running around the house, (and she pooped EVERYWHERE) and it was needed according to our Vet to make sure her bones and muscles developed properly. Her cage alone cost us about $300.00 and in less than a year we needed a new more expensive one, because she grew.
Iguanas are NOT "beginner pets." They require 100 times the care of a cat or dog, and if not properly taken care of, regular vet visits and all the proper equipment, they will die from either egg issues or Metabolic Bone Disease.
Please, find a home for this animal with someone who can afford to feed and take care of her properly.