You can use the time that you are not nursing your baby for collecting your milk. For a woman who works outside the home, it is ideal for her to collect at work during breaks or lunch hour. Using a breast pump is widely known to be much easier than hand expression. However, both methods are highly effective and either one is fine.
Hand expressing breastmilk take a lot of time, practice, and most of all patience.
If you feel frustrated, stop. You will need to be relaxed. Start by collecting a container in which to collect the milk. Make sure it is clean. You can use hot soapy water to clean container.