Hello and welcome! I'm not sure how entirely new you are, but you seem low on posts and considering that's your writer account, I'm going to assume relatively new! If you're looking to find a Sith teacher, first thing to do is join the One Sith faction. If that's already been done, make sure to go ahead and make a post on this thread:
http://starwarsrp.net/topic/65392-master-and-apprentice-request/
If you've already done that, give it a few days. Some people believe in the "Rule of Two" philosophy of one master and student, while some others are willing to take on multiple students at a time. If after a few days you've yet to find a teacher, you can always send [member="Darth Pyrrhus"] a message. She's always willing to help new members find a teacher, from what it appears to me. Don't be afraid to join threads and ask around through roleplay either. It is after all a great way of meeting new people on the forums!
[member="Jacen Saar"]