Maternity leave

So I'm just really posting to figure some stuff out... and this may sound stupid! Lol I'm on maternity leave right now. Have a 6 month old little boy. Husband and I want to have another one sooner rather than later, within the next few months or so.

Does anyone know how mat leave would work. If I didn't get the "600" hours that's required would I not be able to get any mat leave at all? Or is there anything else to do...