As noted in other comments, every situation is unique, but there are some general observations that you could expect to bear out. First, based on reads of reviews, the existence of the dick on the provider is the most important factor for a majority of hobbyists in this niche. They’ll talk about looks, personality, kisses, breasts, atmosphere, but the most charged and enticing part of the session, for those in the majority, boils down to the eroticism they experience the moment they have a cock in their mouth, ass, or both (in the case of duos). You should expect few new clients from that subset.
Second, current clients. I’ve seen encouraging comments here from here from guys who have continued to see a provider post transition. That’s nice to know. But how often? Did a consistent monthly date evolve into a quarterly, biannual or yearly visit? It might be time for an HONEST conversation with your regular clientele. Let them know you’re considering surgery and need to know how it will impact your business. They need to know you value an honest answer over compassionate reassurance, and ask them 1. Have they sought out/dates post-ops in the past? 2. Would they likely see you post-op never, one time thing, or continuing thing? 3. If they date CIS clients, what are their preferences for those women? Tall or short? Slim or not? Racial preferences? That might be a clue to how your appeal to them will be post-op.
Run a test. Place ads in a couple of similar markets you know you’ll never actually visit. In one, run a Pre-Op Stephanie ad. In the other, a Post Op Stephanie ad. Gauge the difference in response. That would serve as a good predictor.
Thirdly, take advantage of your newly created virginity. Maybe run a “Like A Virgin” tour. I’m sure there are guys who would pay triple or more for first shot at your new pussy. Once you’re cherry’s been popped, you might be able to advertise “limited availability to vaginal sex (Upcharge for “breaking it in sessions?) in each city? Once you’re past that, you likely could upcharge for anal/PSE like CIS providers do.
Lots of possibilities, lots of trade offs, lots of unknowns.
Finally, have a vision for post-op life. You’ll be marketing to CIS preferring men who have some level of curiosity. As a tall women, does your weight and body shape need to change? Looks carry a lot more weight for CIS hobbyists than they do for the guys seeking out TS dates. Or consider bulking up and consider marketing towards the guys who want to be pinned down, face sat and scissor squeezed by an Amazon lady wrestler? Dominatrix? Lots of options, depending how flexible you are.
And have another plan. Get a certificate in cyber security, data analytics, coding. Pick up enhance another marketable skill.
Big decisions! Best of luck to you.