My doctor always told to me stop pushing once he saw baby’s head out then he either pulled baby out or let the baby slide out on its own lol I’m not sure but either way it worked with all of my pregnancies!
You can massage there with some sort of oil. I never did but if you want You could probably google to find out. But my nurse gave me massages between contractions and when the doctor came he was amazing and I didn’t tear at all