Those creatures are not real, I'm sorry to say. But there is an extent of what is magick, and what is a myth. There are no actual vampires, the closest thing is a psychic vampire which are psychics I believe, that need to take energy from other people to feel healthy. There is really no werewolves, they plainly don't exist.
Faeries however do exist, but they are not like people portray them, there are multiple articles on fae on this website and I think a website called everythingunderthemoon.com, you can attract them by leaving certain sweets out with a candle, or having a faerie garden. But you most likely won't physically see them unless it's a tiny orb out the corner of your eye.
You cannot turn yourself into these creatures, or give yourself ears and a tail. You cannot change your physical body with magick, it just really won't work. You cannot do more with magick, than nature can do on it's own.
These creatures are nothing to worry about. Though Fae can be pretty nasty little guys sometimes, you just have to get them on your good side by leaving them gifts. Blessed be. :)