How do I ensure I get another male parakeet, if it is a baby?

I am getting a new parakeet, but I'm now under the impression that my bird is a male. I want to make sure I get another male, because I can't take care of baby birdies unfortunately :(. I am going to get a baby parakeet, but if it's cere is purplish, its too young to detirmine the gender. I need to make sure this bird is a male!