The first time round the pain was unbearable, it was the worst pain I've ever experienced in my life. No pain relief for the last 3 hours of labour (don't ask, long story) I ended up with a ventouse delivery, episiotomy and weeks of post-natal pain.
The 2nd time was so much better, a home birth, brilliant midwife, no-one talking to me (at my insistence in my birth plan), loads of G & A (can't recommend it enough), and a very powerful birthing experience. It was painful, there is no getting away from it, but the experience was so much better second time around. I didn't have a single stich and was doing the hoovering after 4 days.
It's difficult when it's your first, and it's so easy to give advice with the benefit of hindsight, but I would say try not to panic or get scared, and trust your body and go with your instincts
I didn't first time round and relied on the midwives to tell me how to push. It turns out (I read about it afterwards), they were telling me to do what they call "purple pushing", when you hold your breath and force all your energy down during the contraction. In my opinion, having gone through it and ended up with a purple face from all the blood vessels that popped in my skin, it's a load of bollocks and it didn;t feel natural at all. And it didn't work anyway as I was pushing for 2 hours and they had to get her out with the ventouse in the end.
It was the worst part of the labour and during my second pregnancy I read about it and decided I would just go with my instincts when I reached the 2nd stage. Of course, 2nd time round is always easier anyway. So with dd2, I just took a massive breath of the G&A and then made a weird sound back into the mouthpiece to push, it was like a massive power coming up from deep inside to push her out. Really amazing actually. I just completely focused and concentrated and no-one was shouting "push" at me like the first time, which tbh, was really annoying. I specifically asked in my birth plan 2nd time for no-one to speak to me and no-one to tell me to push. And in the photos my dh took after DD2 was born, my skin was glowing, as opposed to purple and blotchy after dd1.
Good luck with everything.