Once you've completed your profile, you're ready to search for a mentor. From the main navigation bar (at the top of the screen), click on Find Mentor. The search will automatically populate with the fields that you have listed in your profile, and will show you the mentors who are your closest match based on these details.
You can add in more search terms by clicking in each box, or remove what is there by clicking the cross on that particular field. Click Update search results to see your new list of potential matches. Once you find a potential mentor, click on View Details to see their full profile, and send them a request or question. Within your message, include some information about what you are looking for from a mentoring relationship, and some details about why you think they would be an appropriate match for you.