This is an unusual time of year for an amazon to be hormonal. Typically they experience hormones in the late winter/early spring as the days get longer. However, hormones can be eased by a consistent schedule of day/night (use a dark cover and don't take those covers off until "wake up time" even if you hear her up and moving and have a strict bedtime too, even if she's not tired. She WILL adapt to her new schedule

), lessen fruit intake (the sugar!) while upping low sugar veggie intake, do NOT touch her wings, back, belly or underside (those are sensual areas on a parrot), increase shredding toys and IGNORE outward hormonal behaviors while encouraging more acceptable behaviors. And be aware SOME female amazons will er (no polite way to put this) masturbate. IGNORE IT. Turn your back and leave the room. If she's a bird who does this, you may not be able to stop it but you surely don't want to encourage it or in any way show your approval/interest! Female amazons are not particularly prone to laying and accompanying problems, but since she is new to you, do watch for the symptoms of egg binding and if she does start laying, consult your AV on what should be done (dummy eggs, dietary changes/supplements ext...).
As for diet, amazons are opportunistic omnivores who eat primarily fruit, nuts and seeds in NATURE. Since we can't provide them all the things they naturally eat, they benefit from a varied diet heavy in fresh foods. I *personally* feed Kiwi lots of fresh produce, Volkmans fancy soak and simmer
Volkman Seed Company, healthy table food, various bird-friendly baked goods and Vitakraft Menu Parrot Food (a blend of seeds, dried grains/fruits and some pellets, he gets 1/8cup a day during the day ago snack on after he's eaten his healthy food)
Vitakraft® Menu Parrot Food | Food | PetSmart.
We also always have little "additions" for variety. We recently started adding Goldenfeast Gardenflora blend in his cooked grains mix, he gets other random Goldenfeast mixes (we buy a different "flavor" as they run out), and I also recently bought some Goldnfeast Goldn'Obles as foraging treats (they are little cheerio-shaped pellets, and I've been using them like edible beads in his toys).
Converting her to a healthy diet could be easy or hard, thats up to her

Just be sure she's eating enough. Many birds drop weight dangerously quick because they refuse to eat new foods. As you convert her, mix in whatever "staple" food you plan to use (pellets or a cooked mix) into her current seed mix, and gradually drop the ratio of old food to new food
