insurance for baby?

An
I have no idea how this works honestly. Neither me or my SO's jobs at the moment offer insurance (we obviously are looking for a job that does). But say we don't find new jobs by the time our baby is here, we will have to enroll him in insurance. I live in Illinois and have NO idea how to get information. Me and SO are both under our moms insurance until 26. How much is it a month for decent insurance for a baby? 
 
I feel so stupid. But I'm stressing about this 😔