What should we know during labour?

Hello, can anyone pls share tips what to do during labor. I kind of forget of what to do.

With my first pregnancy, i only prepare for the baby stuffs and all . I dont know how to breathe properly. I used epidural too early at 3cm and by the time i was 10cm the epidural doensg work and i still feel during labor. Should i do exercise to make the delivery better. Any tips would be appreciated thank you!!