===> "I would guess first timers doing otc or even itc extras are a similar quest."
Not quite, at least on the OTC front. I think the difference is that a first time OTC stripper is already doing sex work, even if she's not fucking and sucking. She's still earning her living rubbing on guys and generally leveraging their hard-ons for her financial gain. It's a smaller jump for her than a girl who has never done that sort of thing. Once she commits to it, I find that most of these girls see it through.
The newbie SA girl I would agree has a little more ramp to run. But even so I find the payoff to be worth it once she finally pulls the trigger. A girl generally doesn't go on SA because she's confused about what guys want - sometimes it just takes them a little longer to work up the nerve to go through with it.
But where the similarities exist is in the early hotel experiences. They often need to be led through the encounter. It's the most natural feeling p4p experience I know. I often find myself reverting to what I used to do during my dating years to move things over the goal line, which of course is to go down on them. Sometimes they cum and sometimes not, but either way they're more than ready for the rest of the adventure.
Good times.