If you want to get into kink and bdsm, it is vital that you start networking and getting to know people in the community. If you live in a big city it will be pretty easy to find a scene, get to know people and get personal recommendations of who to play with. If you're just beginning, it's important to pay attention to people's reputations. It's safer to go with people who participate in events, or are part of groups instead of loners, since the formers will be known and vouched by others.
If you live somewhere else, you could start by finding out if there's a local community on FetLife.