Erm... go to the local pub, genuflect before him and serenade him, confessing your undying love for him... I think. That's how crazy kids do it these days, isn't it?
You might want to speak clearly and make your actual point in proper sentences. Assuming you mean dedicate yourself to Satan's cause, because you are yours and you keep yourself forever, then how did you find these groups but not know anything about being dedicated?