Sounds like everyone has good advice. I know I'd like to keep them young and sweet for as long as I could before they become hormonal and want to breed. Hate to miss out on the mush-mac stage. That said, from reading posts on this forum it seems that breeding is terribly fraught with dangers. Parents might not incubate, might hatch but then neglect, so that you have to pull the babies, put them in an incubator, and feed them around the clock with special formula, at the right temperature so they don't get holes burned right through the delicate crop or impacted crops from being too cold... it's easy to accidentally get formula in the air sacs instead of the crop, causing fatal infections ... or the parents could mutilate the babies, biting off their feet, eating them, all sorts of awful outcomes.
Have you the time to enjoy the macaws for a year or so, getting to know them, socializing them, getting that good macaw love, while reading up on breeding? Talk to some experienced breeders? That would give you time to assemble the needed emergency equipment and resources and maybe even help out another breeder for the experience. For example, you need an incubator on hand because if something goes wrong, you must pull the babies right that second and they must have a clean, prepped incubator to go in. You have to have formula on hand. The horror stories from people who have had to cope with emergencies, not being prepared for that event, are heartbreaking.