I was moderating this board around the time #2 came along. I had to crash course my textbooks the last couple weeks and read up on newborns and nursing again! Just remember to get a really good and wide latch, bringing the baby to you on pillows and not leaning over or trying to hold him in your arms. The first few weeks are demanding, but you know that now, feeding every 1.5-2hrs days and 2-3 hrs nights. If you just go into it with that mindset, survive the first 6 weeks with two and keep nursing, you'll do fine.
Nursing was pretty easy for me the second time around, but I still had a ton of questions. Is his poop supposed to look like this? Why won't he eat more than four minutes? How can I keep him awake to nurse longer? We all ask the questions every time, each baby is so different!
Best of luck!