Caring for a newborn can be challenging for a variety of reasons: you're tired, they need something all the time, and most of all: they can't tell you what they need. It's hard trying to guess the need of your newest addition, and sometimes it's frustrating. We often imagine them being "difficult" on purpose. And despite our pleas, they won't simply tell us what they want.
Remember this: they don't know what's wrong either. A newborn doesn't think in the ways you do. They feel, and mostly, early on, they know the feel good or they feel bad. In these early days and weeks, if a baby feels good, he/she is sleeping, is quiet, or is smiling and taking in the world. If he/she feels bad, he/she will fuss or cry. There's not a lot of discernment.
Good feelings: full, well rested, amused, clean, freshly diapered.
Bad feelings: tired, hungry, hurt, pain, irritation, discomfort, gassy
So, as you care for your baby, take a deep breath, remember he/she isn't being difficult when they cry. They just feel bad and need your help.