I always prefer to communicate through the site, where others might enjoy the discussion.
Like me, you're an agnostic atheist. Admitting you don't know and could be wrong makes you agnostic. Regardless, your lack of belief in gods or the equivalent makes you an atheist.
Believing our future and our choices are set is called determinism. I don't believe in free will either (sure, we can do what we want to, but we can't want what we want to) but I stop short of being a determinist like you.
That's because there appears to be a random element in the universe. It's what quantum mechanics were formulated to explain. It rarely affects any event we might actually observe, but it seems that on an atomic level the position and velocity of any particle is often not even determined, let alone predetermined. There's no way to control this phenomenon so it's no friendlier to free will than determinism is, but it does suggest that the future path of the universe is only secure on the surface, and only most of the time.
Don't feel you have to categorise yourself at all if you don't want to, but purely by definitions, you're an agnostic atheist and a determinist. I'm with you on two out of three.