Money with 2nd child

Hi my boyfriend is in the navy , I have a 2 year old to a different guy and I’m expecting another baby in October with my bf now. He earns 1.3k a fortnight (goes up after he’s off base) because he’s training to be a marine tech and at the end of his training he will be on 2k a fortnight. We are moving into our own place and the navy have accomodation which is $330 a fortnight. Do you think it will be ok? I’m so stressed 😣 I don’t want to struggle my entire life!!