Looks like your pics didn't work. Anyways, congrats for the monitors.

You have a long journey. Very few people successfully bred any of the prasinus group monitors. There is no 100% sure formula. I can tell you that 85F will work for the eggs. Providing an ideal/suitable nesting place will be, by far, your greatest challenge.

German guys have been breeding them with some regularity, so their forums should be a good start for you to resource.

Other than that, heat and feed a lot.