I'd say, wait a week or two to discover his personality, and see what may fit.
I usually pick some default human name, until I figure out what to name the bird. Problem is, I usually end up sticking to the human name, because I'm so used to it.

That's how Lucy became Lucy, and Joey became Joey.
Well, that's half the story, actually. Lucy was partially inspired by a very old show that I should be to young to know about, called "I love Lucy". When I gave Joey his "temporary" name, I was thinking about kangaroos. I don't know why... (coincidentally, diamond doves are actually from australia).
"Nooburd" sounds like "Noober", which rhymes with "Goober". Maybe you could name him that.

Nah I'm kidding. Like I said, just wait a week or so.