A good place to start on SoM is Newbie Central, here's a link.
This page has many things suited to people new to the site and to Magick, the FAQ's and featured articles are helpful to people who do not know much about magick or how to use the site. Also I reccommend doing some independent study first so you can find out what it is you're actually looking for and what that means. It is always smart to study and know what something is before you immerse yourself in it. Plus it is difficult finding someone able to teach you when you don't know what path you want to take yourself. There are many different paths in Paganism, Wicca, and Witchcraft and many people trying to teach different things it is best to know what direction you want to take before trying to find a mentor.