Start with short sessions, maybe 10-15 minutes. If you prefer, start with an audio guide. Try to focus on the process and remove any other ingredients. Count breaths, find a comfortable sitting pose, and work through any intrusive thoughts until you have a clean slate. If you can get through to a point where the sounds, smells, and light around you doesn't pull you out of this "empty" state, you'll find a clearer, more balanced mental state waiting for you on the other side of the session.