I would echo the same. I always wanted an African grey. I couldn't afford one when i was your age, I got a cockatiel instead that, although not the same....was my buddy for 10 years. They are great birds and much easier to care for and not as loud if they aren't getting what they want!
I've had an African Grey for over 13 years. He is one of the kids and a brings a tremendous amount of pleasure to my home. Smarter than any dog we've ever had. They require a lot of attention and if they don't get it, they tend to wig out or feather pick. Luckily we have never had a problem with him.
At 17 i think i would wait a bit - you really don't know the direction your life will take. I am 41 years old and I have willed my grey to my son. I can't imagine that kind of commitment at 17. Of course that be more of a statement of me at that age than you
Good luck and God Bless!