Sooo.. I'm confused on health insurance for my baby once she's born. I can't apply for anything until then, but I have…

Sooo.. I'm confused on health insurance for my baby once she's born. I can't apply for anything until then, but I have no idea what I'm even doing. Where did you mommas go or apply at once baby was born? We're looking to get separate health insurance for her since it costs about $400/mo for my husband to add her to his and I'm almost positive I can find somewhere at least half that price. Advice anyone?