You'll find a lot of people who are "willing" to be a tutor for you. However, there are many teacher who will teach you something their way or just completely misinform you on something. How do you know if they are valid? Especially online? It would be letter to just gather some books and start studying. Just like any other subject, Magick is something that must be learned, and practiced.
Now, the books you buy will depend on what exactly you want to learn, so try to find a path of some sort, or just have a look in the General Info forum and read Starting Out, along with The Basics Expanded. Those are two good threads to read when starting.