Just take Labor one breath at a time literally lol. Every labor is different but 9 times out of 10 painful. Every contraction just try to talk yourself through it. Just tell yourself . It's going to hurt but it's all worth it :) that's my only advice for labor. As for your bag of course pack things for baby change of clothes for yourself . Laptop. Music maybe something to read.
Get your bags packed asap. Labor I cant help you with, I dont remember my labor from my first and that was almost 6 months ago