Hi Op
Firstly, it's OK to be worried about being prepared, but remember there's a reason there's eleventy billion books, videos, products, opinions telling what and how to do it. Cash. Cold hard cash!!! You'll get free advice here, and top rated products. If you search old threads 'what do I really need' has been done loads of times. Eg, as a mum of three and veteran if many useless products, I can vouch the IKEA highchair is by far the best. Likewise get big muslins, lots of them.
Secondly, your baby doesn't know you haven't read the books. Your baby knows your voice. You are the expert of your baby. Take your time. Don't panic. Listen and watch your baby. Like pp said, you have to help your baby to sleep. Likewise, you have to help them by watching the clues they give. Don't rush to them immediately, whatever your instinct. You will learn to look, listen and read them. Is the cry a mwah, mwahmwah siren? Is your baby turning its head to the side? That's a hunger call. Is baby pulling her feet up? That's wind. You have to stand back and watch before you can work out what to do. Sometimes it's a process of going through checklist of what it could be - it might even be 'stop fussing and leave me alone, it's too bright'
On a more serious note, re birth plan, one really useful thing from NCT classes for me was talking through how many people would be in the room for a C-section. I went in overdue with a 3 page, no pain relief, hugely optimistic birth plan. Epidural & emergency section later, I was really grateful for having played with 7 or 8 Playmobile figurines weeks earlier, knowing who was consultant, midwife, theatre techs, doing something with anaesthetic, student etc. Otherwise, sheer number of people would have made me freak out (already freaking out from speed of it, until theatre team started talking about Coronation Street over my belly. What's their normal every day work situation. Okay..)
You know what, it was fine. Each of my births was very different, and each time I was very happy. If you expect them to be very specific, you will be disappointed. Birth doesn't happen like that. Go with it, try to be as flexible as possible as you just don't know how it will be for you, what your body will feel like. Staff will help and guide you. Trust and believe in yourself - ask for the help you need.
Good luck!