Hi and welcome.
Good to see a first timer who has done some research rather than just ask who should I fuck?
Having looked at those profiles we clearly have different tastes so difficult for me to comment, but I will anyway.
If I had to pick one would go with KinkyVirgin because she has reviews on here and does OWO. One review is negative but the positives are from a member with more weight on here (IMO) and the positives are more positive that the negative is negative. If that makes sense. Her cost is reasonable, she has been around a while and pictures OK. Could do with a few more showing more. No alarm bells for me.
Leic Mistress second but I wonder if more into webcam etc than escorting.
The other one says no sex with clients so why? (I am not in the dom thing, so my view perhaps not that relevant).
Not sure whether that helps. Would recommend the good punts in EM thread for you to get other ideas.
Enjoy yourself, and post a review.