I thought I was prepared for #1. I'd read lots practiced everything I could possibly practiced, and was excited. I had everything ready, beautifully ready for about a week beforehand!
When I went into labour at 1am, I woke dh up in excitement and we talked until 9am in excitement. #1 was born 7am the next day after a very tiring labour with epidural. That 8 hours I could have slept through early labour would have been very helpful.
With #3 I poked dh at 5am to say I was in labour. At 8am, he woke up and asked if he'd dreamt me saying I was in labour.🤣
Ds was born at 1am the next morning, and we were home by 4am. We were so badly prepared that I hadn't bothered with a birth plan and we hadn't got anything out ready for the baby. Ds spent the rest of his first night in a doll's cot as that was all we had out.
So preparing didn't do me much good.
However that's probably the difference between #1 and #3 rather than preparation.
I'd say, yes to preparation. Know what your options are.
But don't expect it to all go to plan. The people I know who told me that the baby would be breathed out gently on exactly the due date (they alone knew their exact date and were most insulted that we suggested baby might not come on that date) had all the painkillers they were allowed and baby was born a fortnight late. I suspect the fact they were so certain exactly what would happen was a great factor in the dp nearly being escorted off site by security them not coping very well.
If you decide on an epidural then the midwife waving a consent form in front of your nose in the middle of labour-well, you'll sign anything at that point. So it's not a bad idea to know the pros and cons of anything you may be offered.
A big sign saying "DO NOT WAKE ME UP! I HATE TEA" would have been very helpful as well.
Have what you need ready in a bag, including things like phone chargers. With ds we hadn't even taken a car seat in and needed to borrow one from the hospital. You don't know how quickly you may need to get in. #3 was nearly born in the lift on the way up. That wouldn't have been on my birth plan even if I'd got round to writing one.
Stay at home as long as sensible. With #1 we rushed in and I should have probably waited another 12 hours before going in. Although I did go in on the bus, so maybe that was a good idea. With #3 we left it too long. Nearly oops.
And the other thing is that don't set your heart on a particular labour. I've know a couple of people who years down the line are still upset because they didn't have the perfect birth they'd planned.
Just remember that it won't last forever and it's better than appendicitis because at the end you will have a lovely baby, and that's the best bit.