Mentoring, or teaching, on-line is very difficult. After all, you would only be reading; and there are many books! There are so many "paths", so many beliefs; that trying to teach on-line can only result in absolute confusion. It is why the Mods, like me, advise joining a real coven or Pagan group. At your age it would be a good idea to join such as "The International Pagan Federation". (Address on Google for your area.) The magazine alone is worth the subscription.
Otherwise, on this site, ask questions! Somebody will answer. But be careful. The site has many children who claim to know everything, but know very little!