Hi Kathy, welcome. My advice is not to get too hung up on learning "about Greys" and instead just focus on learning about parrots and caring for them in general. Sure, there may be some generalizations or nuances of particular species, but the overall care of "parrots" already encompasses so much more than we are accustomed to with mammals that this will dominate the bulk of your learning and experience.
I saw that in your profile it says that your birds don't fly. This is quite unusual in the wild, though unfortunately it is all too usual in the pet parrot community. I would highly recommend learning how to make your home safe for birds to fly, as they are your chosen pet, and learn how to train/manage them so that this could be accommodated. Without knowing much more, that's just one example of advice related to parrots in general that I could give you that is so much more important than things specific to African Greys. Best of luck to you and enjoy the forum!