African Greys are A LOT of work, it's like having a flying 5 year old to take care of. They have as much dust, if not more, than a cockatiel. So many things you need to research, experience, and learn that I can't fit it all in eight hundred posts before you know how to properly take care of them.
GCCs are like cockatiels, but a little smarter and louder. Also don't have as much dust. Also put into consideration who will watch your bird when you go to college and school. Your bird will live a long time, make sure you are up for the challenge. Birds are in many ways harder to take care of than cats and dogs.
Just continue to do your research and make sure you know a bird is right for you.