This is one version of my opening. Is it engaging?
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The first thing Tobias remembered was the darkness. The entire city lay sumbmerged in eternal black. The Nightcity, he called it, for it had no other name. Back then, neither did he; he remembered that very clearly.
He was younger in those memories, about four.
Unlike the other children he watched, he never feared the dark. The shadows had always been kind to him, talking to him, comforting him. They were all he had back then. Maybe he was one of the shadows, because people, real people, never talked to or looked at him. As if he were invisible.
But then, one day, he woke up with a name and an identity: Tobias Miller. He always felt odd about being Tobias Miller. It never felt real. But was the Nightcity real?

I think it might be to much info to soon. But there is a promise of a good story in what you have.

There is a major clarity issue. Is Tobias Miller his name as a shadow, or is it his name to the real world? Both are implied in some ways and discredited in others.