There are a few things you can do to feed as a vampire in Skyrim. First, you will need to find blood sacrifices. There are many places where blood is being offered, so it is important to find one that you feel comfortable with. Second, you will need to find food. There are a variety of foods available in Skyrim, and it is important to choose the right ones for your needs. Finally, make sure that you have enough blood to sustain yourself.