seeking direction in exploration

I’m a 29-year-old male who has never been married and have been doing SB for several years, really enjoying it. My life is very quiet, and I keep my submissive side private. However, I want to dig deeper into the punishment aspect. Struggling with sticking to personal punishments, having someone else do the punishing would be great. Also, I feel like I’ve hit a ceiling in how far I can go alone; I’ve cut down the overgrown path but haven’t mowed the lawn yet, if that analogy holds. Since I prefer keeping my secrets hidden from those around me, and while I want to explore these feelings, I’m not sure where to begin. What is it like practically finding an internet mistress? Where do you start when diving into the scene? How does one generally find a mistress? tThanks for your assistance