Iguana rarely make appropriate pets (as defined in the US) for ANYONE. The normal concept of a pet is an animal we can socialize with at least a little. Like dogs, lab rats, and parakeets.
The right people for captive iguanas are those who know and accept iguanas' natural negative quirks. Like biting and tail whipping, being extremely shy, are sometimes hard to get them to eat, vet visits, and more.
Iguana bites from adults and even juveniles are often very extreme, requiring stitches, and one woman who used to be a contributor here lost her middle finger to a bite. Look up Iguana Bites on your search engine.
Many or most iguanas can be tamed by dedicated people who are willing to devote a little flesh and blood to the process.
Plus, you need a UVB meter, a UVB emitter (bulb) which are special short-lived lamps. And more.
Anapsid.org I cited above has all the information we know about iguanas.