1st baby Advise!

Okay so I just learned that I'm pregnant! I'm not married which is okay in my mind, I know who the father is but he was abusive and I couldn't stay with him any longer and we broke up right before I found out. My ex (who I was with for 2 years before I met my last one) and I are trying to work things out. I've always been completely in love with him. Not the point. I'm 18 about to by all legal standards be a single mother. And I have NO CLUE what I'm doing. So any advise or notes or just things you realized has helped a lot would be great. Annnnnnnd go😘😘😘