As I stated, all people have a capability to do magic. Powers? People don't throw fireballs, levitate, fly, or read minds with magic.
Magic is not at all like fiction and media portrays it to be.
I would recommend you seek out Mastering Witchcraft by Paul Huson. I think it's a good beginners book.
It's important to note there are many forms, paths, and traditions of witchcraft.