Definitely good to start doing as much research as possible! African Greys are fantastic parrots. Incredibly intelligent, and known for being great at learning to exactly mimic noises.
Diet-wise, a high quality pellet base is a good place to start. Incorporating fresh fruits/veggies/grains to round it out and give them variety, plus whatever treats you end up using. You do want to steer clear of a seed heavy diet, though they are fine as treats.
As with most, a variety of toys is always a good idea. As is a variety of perches in different shapes/sizes and textures.
In my experience, they can often take a bit longer to warm up to new things than some species. And they aren't generally known for being an overly cuddly species, but every individual is different. Our CAG confetti for example goes out of her way to cuddle, though I'm often told that's the exception.
If you have any specific questions don't hesitate to ask. You found a great place to soak up others experiences! Coming here made all the difference for me when I first entered the world of Parront-hood, and it was with the impromptu adoption of an African grey as well!
