Look up breathing for child birth and practice them ! I wish i would of studied them the nurses helped but there's only so much you can learn when your in that much pain. When I breathed it helped a lot it still hurt ut i felt in control. good luck, it will make you feel really empowered and strong :D i feel like i can do anything after giving birth drug free ! :'D
make sure your bag has things to make you feel relaxed. try positions that will work with gravity to help while pushing. make a playlist on your phone of music that makes you feel calm and confident. if you're religious, find some parts of scripture that will help you to feel at peace and empower you for while you're waiting for the big moment of pushing the baby out. perineum messages will help with the risk of tearing during birth.