Some birds will "nip" more than others. I'm not the one who originally commented, but I have two GCC, and a bit of general bird experience. When people spout out to ignore bites, there's a certain kind of bite I ignore. I'm gonna backtrack a bit- the original comment was right. Don't ignore your bird, try and understand it. But once you guys start making some progress "nips" will happen. My turquoise will do it during cuddles. 9/10 times it doesn't hurt and I have no idea what it means (it's not to quit cuddling, I've tried that), so I am convinced it's a bird thing or maybe an affection thing. Who knows? But that nip is harmless, she doesn't do it out of malice, she doesn't do it to other people (she'll bite if they're not careful, but not that same "nip") and overall she's an incredibly well trained bird.

I follow * a lot* of bird Instagrams, and I suggest any new bird owner to do the same. And not just GCC Instagrams. I follow a lot of bigger parrots and have learned so much about my birds just by learning about them.

Another good tip I didn't see mentioned: because the birds are new and biting (because there's no real level of trust between them and your hands) try and always remember- these birds can't see shit in the dark.

If it's time to put them up and they won't step up, turn out the lights, get a towel (after the lights are out, else seeing the towel will spook them) and gently pick them up and put them in their cage. Then turn the lights back on and reward through the bars of your cage with a treat. Imo this also helps you avoid cutting their wings if that's something you're interested in. Remember also, at this stage you should be rewarding most everything with a treat. Once they start to warm up, cut down on the treats and speak to your local Avian vet and research about their current diet/what it needs to be, if you haven't already.

Good luck!