I am also a submissive and a masochist (yes my sn is meant as an ironic joke from way back when). I would highly suggest fetlife for meeting people but look for events in your area such as munches or a possible local dungeon/play space you can visit. This way you can meet other people in the lifestyle in a safe manner because as a previous poster said, there are many predators out there. Pay attention to red flags and listen to your instincts.