Best advice for making sure breastfeeding goes smoothly?

Lynn 🤪

I tried with my first and it didn’t go as planned. She lost so much weight and when I pumped I didn’t get much. I want to try again with baby number 2 so give me your best advice. I didn’t feed my first as soon as she was born and I’m wondering if that may have set us up for failure 🤷‍♀️