I'd second advice from PP about ignoring people determined to make you worry about how awful it's going to be. I had a friend who had been through a bit of PND and really hated the newborn phase, and was determined to tell me what hell I had in store.
I loved the newborn stage, some people don't and that's fine too, there's good days and bad. Whatever your new baby is like, everything is a phase- even the bad phases are short lived.
I'm now pregnant with my second, and the same friend is now constantly on about how hard it's going to be...she only has one so far so I just smile 😊
My husband and I had no experience with babies at all, we didn't do NCT or any antenatal classes. My DH got shown how to change a nappy by the midwife in hospital and then he showed me, and we turned out fine. It's nerve wracking but you will honestly just adapt and be a pro within days.
Also re BF, I couldn't get my head around the logistics of it before the birth. Once she was here I realised just don't over complicate it- when the baby starts fussing offer it a boob. Simple
I introduced a bottle at 6 weeks, and she took it fine but I ended up hardly using one as she was always with me anyway so much easier to use the boob. But with this baby I will make more effort so I can get away for a few hours easier
Good luck! X