Terrified I'm going to be bad at this

My mom was in and out of my life, she was an alcoholic and abusive at points. She's a master manipulator. She would be blackout drunk the night before and wake up the next morning with breakfast cooked and my lunch for school packed.

My dad was a good father but he worked all the time because single father's don't get help like single moms do.

I really didn't have parents growing up. What if I'm bad at this? What if I can't be a mom? I want to be a great mom but she really wasn't a good example. I know that I can break the cycle. But I suffer from a lot of mental health issues and most of them go back to the way my mom was. I just want the best for my child and sometimes I feel like I can't give her that because I'm too messed up from my childhood.