Hi,
Yes, you can certainly do well as a pro-sub, but I am unsure if you are looking at adding 'sub games' etc to your AW profile (for instance) as an extra service, or if you want to offer that exclusively?
Also any advice on going ahead would depend on what you mean by 'submissive in the bedroom'? Do you mean submissive in the vanilla sense, or do you mean you have had more than a good dabble into the world of BDSM?
As xw5 says, in this game, regardless of the whole D/s thing, the sub is always in charge and 99% of Doms understand where the power lies, it is not different when escorting.