How will I know what my baby wants and needs?

For newborn, most of the time will be 'NEEDS'. He/she needs to be fed, to be patted, to be cuddled, to be changed after pee/poop, needs sleep and etc. A newborn will not manipulate at such a young age and their only way of communication is through crying. Thus, never ignore a baby's cries as it indicates he/she needs to be attended to. You can read up more on the reasons for young babies to cry and how to soothe them: http://www.babycentre.co.uk/a536698/7-reasons-babies-cry-and-how-to-soothe-them