Hi Avy,
My DD was the first baby I ever held - I never changed a nappy until her. Therefore, I read and read and read tonnes of books - some of which I found useful tips and others made me strongly disagree and therefore helped me to make parenting choices too. But, it took me a long time to stop reading the books and to start reading my child.
There is a reason there are so many books on parenting out there, and a reason why so many contradict each other - every child and every parent is different. What works for one may not work for another. Find out what works for your child and you. Some babies may be a bit windy or nervous and therefore more likely to cry for reasons other than hunger, tired, wet/ dirty and they may need to be simply held while crying. Other babies will simply cry when they need a physical need attended to. The trick is to figure out what is the temperment of your baby and to learn the different crys? You know your own baby much better than any "expert" author!

Go with your gut feelings and have confidence in your parenting skills.