I wouldn't say red lights, but personally I would be a bit concerned that she has been on AW since March and only managed one feedback.
The other thing is she is down as bulgarian.
To be honest if it were me for my first punt I would avoid EE's and look for British with someone with a little more reputation for providing a good time as if you have a mediocre punt for your first put it may put you off doing it again.
If it were me and you really wanted to see her I would message her via AW and ask is there any requirements for the A-Levels and see how she responds (even if you don't want to do it, its a good way to find out her attitude to this line of work, as if she starts with the whole its an extra £40 or whatever you can get an idea of her attitude. Same goes if she says no its all in.